My jeep stalled at a red light and wouldn't start, just a click. I smelt burnt wiring . The dealer says the engine or trans ?? Really ?? It was running perfect, 170,000 miles. Now they say 500 for the diagnostic tests ??? This is crazy !!
The dealer says that so you get used to a big fat stinking pile of BILL upfront. You could do a thorough search under the hood for the burning smell. The dealer saying "engine or trans" is vague at best. The problem sounds electrical.
There are cable and wiring harnesses everywhere
Find the source of the smell
Look for a burned wire
Check your alternator (autozone can probably do this for free)
Fuel supply lines?