2003 Jeep WJ Limited, 4.7 (non H.O.) with hydraulic cooling fan
Does anyone know which plug and pins are used to control the hydraulic fan solenoid?
I have tested the solenoid and it is good so I am now trying to determine if the wiring is bad or the PCM.
What I am trying to avoid is cutting into the wiring bundles at the plugs to reveal the wire colors.
Cav circuit function
1 f15 18db/wt (diesel) fused auto shut down relay output
1 f142 18or/dg (gas) fused auto shut down relay output
2 k173 18lg (diesel) hydraulic radiator fan solenoid control
2 k173 18lg (gas) radiator fan relay control
3 z500 18bk ground
My hydraulic fan sucks to,not literally. Engine temp is at 230 and fan is just idling i say b.s on that setup
As any man made product, also the hydraulic cooling fan can give a problem, not making it a bad design on itself.
Remove the coolant temperature sensor connector and check if the fan goes to high speed. If it does, then you know that the fan and solenoid are working.
If it doesn´t, then you will need to check the solenoid first. No DTC set?
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.
We talked about this before, it goes in high speed when its unplugged, and cel goes on. Some reason seems like no signal is being sent. Or the threshold is set to high. Im going to change the coolant temp sensor and see if that fixes.