Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WJ > Troubleshooting/Problems

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 05-13-2012, 12:49 PM
Member
My Jeep: 2000 4.0L WJ
 
Join Date: May 2012
Location: Florida
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 868
markon is on a distinguished road
Lighter Accessory Socket Melting Plug Ends

Hi, first post here!

I bought one of those 4-way lighter socket adapters so I can use multiple gadgets. It lasted a few months, then one day I smelled plastic burning and my gadgets started cutting out. I checked the adapter's main plug that plugs into the Jeep's accessory socket. It was melted and would no longer hold in the socket.

I bought a different brand of adapter and the same thing happened after 2 weeks of using it.

Neither time did the fuse blow. So I don't think I was exceeding the allowable amps. I'm not running alot of high amperage stuff anyway. It seems like these adapter plugs just can't handle the heat in the socket. Has anybody else experienced this? Maybe certain Jeep models just have really hot running accessory sockets? Or maybe it's just crappy plastic used by the adapter makers? Or a combination of both?

Thanks for any ideas!
markon
__________________

__________________
Reply With Quote
  #2  
Old 05-13-2012, 01:08 PM
Frango100's Avatar
Premium Member

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 4,908
Thanks: 9
Thanked 92 Times in 87 Posts
Rep Power: 525859
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: Lighter Accessory Socket Melting Plug Ends

Heat buildup occurs if the connector is not making a good contact, creating a low resistance, which causes it to heat up. The cigar lighter normally uses a 15A fuse, so check if its not changed for a higher Amps one. Did you check the jeeps socket if the contact area is clean and doesn't have any corrosion or alike on its surface? If thats ok, most probably the adapters are crappy.
But its not normal for the adapter to heat up, a little bit of warmth is acceptable, but it should not heat up.
__________________

__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
  #3  
Old 05-13-2012, 06:13 PM
Member
My Jeep: 2000 4.0L WJ
 
Join Date: May 2012
Location: Florida
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 868
markon is on a distinguished road
Re: Lighter Accessory Socket Melting Plug Ends

Quote:
Originally Posted by Frango100 View Post
Heat buildup occurs if the connector is not making a good contact, creating a low resistance, which causes it to heat up. The cigar lighter normally uses a 15A fuse, so check if its not changed for a higher Amps one. Did you check the jeeps socket if the contact area is clean and doesn't have any corrosion or alike on its surface? If thats ok, most probably the adapters are crappy.
But its not normal for the adapter to heat up, a little bit of warmth is acceptable, but it should not heat up.
Thanks Frango. That makes sense. I bet that's what happened. I drive around, using the gadgets, but never worrying about the plug seating in the socket. After so much driving, it gets loose, but still makes enough contact for the gadgets to still work. So I think nothing of it. In the meanwhile, heats building up due to the poor contact, the plastics warping a bit, making the fit slightly looser. Eventually, it comes unplugged enough for the gadgets to stop working. So I shove it back in and the cycle starts again. After several cycles of this, the warpage is too much and the plug no longer stays in.

So next time around, I will have more respect for the connect. Make sure everything's clean. Make sure it's in there nice and tight. Check it alot. Sound like a plan. Thanks again! I think you nailed it.
__________________
Reply With Quote
  #4  
Old 05-14-2012, 10:06 AM
01grand's Avatar
Super Moderator

My Jeep: 2001 4.7L WJ
 
Join Date: Dec 2010
Location: Prior Lake, MN
Posts: 1,805
Thanks: 37
Thanked 62 Times in 61 Posts
Rep Power: 54347
01grand has a reputation beyond repute01grand has a reputation beyond repute01grand has a reputation beyond repute01grand has a reputation beyond repute01grand has a reputation beyond repute01grand has a reputation beyond repute01grand has a reputation beyond repute01grand has a reputation beyond repute01grand has a reputation beyond repute01grand has a reputation beyond repute01grand has a reputation beyond repute
Re: Lighter Accessory Socket Melting Plug Ends

How many extra things are you plugging into it? Just because the plug on the Jeep is designed to handle 15 amps doesn't mean the adapter is. I would see if the packaging lists a maximum current draw, but I would suspect that the problem is just too much current for the adapter to handle. I would also check for corrosion like Frank said, high resistance will cause heat to build up quickly. Are you using the cigarette lighter port or the "power outlet" port?
__________________
Aaron

My Jeep: 2001 Grand Cherokee Limited, 245/65R17 Falken Rocky Mountain ATS, K&N drop in air filter, Bilstein HD's. De-badged, eagle-eye LED Tails & LED 3rd brake light, Addco front and rear sway bars, Superchips tuned & TM snip, interior 6k LED's, Gen3 ccfl projectors with Volt 6k HID lows, akebono brake upgrade with R1 Concepts premium rotors.
Reply With Quote
  #5  
Old 05-14-2012, 12:53 PM
Member
My Jeep: 2000 4.0L WJ
 
Join Date: May 2012
Location: Florida
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 868
markon is on a distinguished road
Re: Lighter Accessory Socket Melting Plug Ends

Quote:
Originally Posted by 01grand View Post
How many extra things are you plugging into it? Just because the plug on the Jeep is designed to handle 15 amps doesn't mean the adapter is. I would see if the packaging lists a maximum current draw, but I would suspect that the problem is just too much current for the adapter to handle. I would also check for corrosion like Frank said, high resistance will cause heat to build up quickly. Are you using the cigarette lighter port or the "power outlet" port?
These things don't handle alot. The first one had a 6 amp fuse. The second one had a 5 amp fuse. I'm running a GPS, an MP3 player, and sometimes a Papa John's sign (I know. Don't judge!) The GPS is .5 amp. The mp3 player is probably .5 amp or 1 amp. The pizza sign has a 7.5 amp fuse. Converted to watts, that would be 90 watts. So I'm thinking a 75 watt bulb, which would be 6.25 amps. If it's only a 40 watt bulb, that would be 3.33 amps. So at least, I was drawing 4.33 amps (.5 + .5 + 3.33). At most, I was drawing 7.75 amps (.5 + 1 + 6.25). I never blew a fuse though - 6 amps and 5 amps. Either way though, I was running close to the limits of the splitters. Combine that with the fact that the main plug was jiggling loose every now and then, I can see why it would melt.

I definitely need to be more diligent about checking the main plug's seating. That's the danger of having the type of splitters I've been using. They have on/off switches, which is a really cool feature and the reason I bought them. I didn't want to be bothered with constant plugging and unplugging of plugs. This is also the downside of this product. You get lazy and never check your connections. You're just flipping switches. Then the connection gets a little loose, starts generating some heat, but you don't notice because everything still works.

Tomorrow at work, I'm going to find out how many watts their sign bulbs are. I'm wondering though, is there any ingenious way I can use my multimeter to test the load while I have everything plugged in and running?

Thanks!
markon
__________________
Reply With Quote
  #6  
Old 05-14-2012, 01:47 PM
Frango100's Avatar
Premium Member

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 4,908
Thanks: 9
Thanked 92 Times in 87 Posts
Rep Power: 525859
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: Lighter Accessory Socket Melting Plug Ends

Depending on your multimeter, it can have a separate 10 Amps measuring point. If so, you could easily measure the total current draw. Maybe that you could get a better quality plug, or even divide the acessories over the cigar lighter and the power outlet.
__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
  #7  
Old 05-14-2012, 10:58 PM
Member
My Jeep: 2000 4.0L WJ
 
Join Date: May 2012
Location: Florida
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 868
markon is on a distinguished road
Re: Lighter Accessory Socket Melting Plug Ends

Quote:
Originally Posted by Frango100 View Post
Depending on your multimeter, it can have a separate 10 Amps measuring point. If so, you could easily measure the total current draw.
Thanks. My multimeter does have the 10 amp option. I've never used that though. I don't understand how I would take the measurement. If everything is plugged in, there is no point left for me to touch with the probes. What would I touch with the negative and positive probes?

Quote:
Originally Posted by Frango100 View Post
Maybe that you could get a better quality plug, or even divide the acessories over the cigar lighter and the power outlet.
Yeah I didn't think about sharing with the cigarette lighter. I can always plug the pizza sign into that at least, then use a splitter with on/off switches for my low power stuff.
__________________
Reply With Quote
  #8  
Old 05-14-2012, 11:26 PM
Member
My Jeep: 2000 4.0L WJ
 
Join Date: May 2012
Location: Florida
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 868
markon is on a distinguished road
Re: Lighter Accessory Socket Melting Plug Ends

Quote:
Originally Posted by markon View Post
Thanks. My multimeter does have the 10 amp option. I've never used that though. I don't understand how I would take the measurement. If everything is plugged in, there is no point left for me to touch with the probes. What would I touch with the negative and positive probes?
I think I just found the answer to this. Something that talks about testing a motorcycle for current drain. The testing part should be the same, hooking the multimeter up in series, instead of in parallel:

Quote:
To test for battery drain: Switch everything off on the bike. Disconnect just one battery lead. For example disconnect the Positive Battery Lead. Set your Multimeter to Amps as described above. Connect the Positive Multimeter Lead to the Battery Positive terminal. Make sure the Positive Lead you removed from the battery does not touch anything grounded, like the Bike frame etc…. Connect the Negative Lead from the Multimeter to the Positive Lead you removed from the Battery. You should now see current drain measured in Amps. Move to the lower Amp setting on your multimeter if the current is lower than the setting on the Multimeter Low setting. Start to unplug the wires or fuses around your bike and see if the current reading goes to zero. This will point you in the direction of the current thief. You can convert to Power measured in Watts by multiplying it by the Battery Voltage. Power = Volts x Amps 4.2Watts or (12Volts x 0.35Amps).
So I would just do this with everything turned off and then with everything turned on, then subtract the difference.
__________________
Reply With Quote
  #9  
Old 05-15-2012, 06:47 AM
Frango100's Avatar
Premium Member

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 4,908
Thanks: 9
Thanked 92 Times in 87 Posts
Rep Power: 525859
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: Lighter Accessory Socket Melting Plug Ends

The current indeed is measured with a multimeter in series with the circuit . There are special clamp type current meters, which you can simply clamp over a wire and measure the current without disconnecting anything. The cigar lighter only works with ignition in on. Most probably the total current draw from the battery will surpass the 10 Amp in that case, so would be too high to measure with your multimeter. So only use the power outlet with ignition in off.
Instead of disconnecting the battery cable, you could also remove fuse 9 (20A) from the power outlet on the junction block and put the multimeter test probes in both open slots and you will only see the current to the power outlet.
Be carefull with the 10 Amp connection of the multimeter. It has a dedicated socket and should ONLY be used to measure the current in a circuit. Don´t forget to unplug it directly after use, to prevent making a mistake when you for example wants to measure voltage. Because even with the selector switch in any voltage range, but the probe still connected to the 10 Amp socket, it will cause a short circuit in the measured circuit and at least melt a fuse or brun your test wires or multimeter.
__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
  #10  
Old 05-17-2012, 11:17 AM
Member
My Jeep: 2000 4.0L WJ
 
Join Date: May 2012
Location: Florida
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 868
markon is on a distinguished road
Re: Lighter Accessory Socket Melting Plug Ends

Quote:
Originally Posted by Frango100 View Post
The current indeed is measured with a multimeter in series with the circuit . There are special clamp type current meters, which you can simply clamp over a wire and measure the current without disconnecting anything. The cigar lighter only works with ignition in on. Most probably the total current draw from the battery will surpass the 10 Amp in that case, so would be too high to measure with your multimeter. So only use the power outlet with ignition in off.
Instead of disconnecting the battery cable, you could also remove fuse 9 (20A) from the power outlet on the junction block and put the multimeter test probes in both open slots and you will only see the current to the power outlet.
Be carefull with the 10 Amp connection of the multimeter. It has a dedicated socket and should ONLY be used to measure the current in a circuit. Don´t forget to unplug it directly after use, to prevent making a mistake when you for example wants to measure voltage. Because even with the selector switch in any voltage range, but the probe still connected to the 10 Amp socket, it will cause a short circuit in the measured circuit and at least melt a fuse or brun your test wires or multimeter.
Thanks Frango. I'll try that this weekend - hooking up to the fuse 9 slot. That sounds alot easier than disconnecting the battery.
__________________

__________________
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
HID fog lights melting 2012sleeper Interior/Exterior/Visual 35 05-14-2013 08:49 PM
Rear fogs corroded socket t-pain Trouble Shooting/Problems/Service 7 08-31-2011 02:46 PM
Fog Light OEM Socket pigtail gtj105 Tech Tips/DIY/How To 1 05-23-2011 09:30 AM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 02:16 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community