1995 Dodge Intrepid 6 cyl Front Wheel Drive Automatic. 3.3 liter. 165,000 miles.
ECM fuse blows after short drive with A/C cooling on sometimes?
All cooling fans are operational. No codes other than code 12 & 55 ring out on dash board. I installed a circuit breaker (20)amp in place of the fuse for the PCM.
I did find a wire loom behind intake manifold had got too hot & melted insulation but repaired that. I am not sure of what it went to exactly--- wiring harness that is--I will have to trace it down.
I drove over a hundred miles with A/C cooling mode in OFF and it runs WITHOUT blowing the PCM fuse.
Could the A/C transducer be shorting the ECM since I see on the shop repair manual it is one of two input to ECM (PCM)from the A/C circuit? No other fuses are blown and they are the correct amperage rating. PCM fuse raing 20 amps.
There are two main components that feed from the A/C circuit to the PCM (1) the A/C relay and (2) the evap transducer. Would the A/C relay more than likely cause an excessive amp draw if the coil was bad-or going bad----thus causing the PCM fuse to blow? What components would most likely cause an excessive current(amperage) draw to the PCM. It is an intermitten short when the A/C is in the cooling mode? Is there something I am overlooking on the wiring schematic?
have the same problem?
Tuesday, May 11th, 2010 AT 9:51 AM