Mechanics

ECU OR BAD WIRING?

1999 Dodge Ram • 171,675 miles

Is it possible that what I thought was a bad ECM due to refusal of my truck to start and a no bus reading in the odometer, could actually be due to bad battery cables and/or ground wiring?

This truck has had three batteries this year. The first one exploded, the second one got a leak, and the new one-will only work if being jumped by another car-which ironically enough got the mileage out of the odometer today instead of the no bus. Also-as long as the truck was hooked up to my other vehicle, I got the truck to crank up! It wouldn't stay cranked up (anywhere from one turn over to 20-30 secs). I also got the alarm to go off-however, it did go off lightly. I checked the connector to the engine fuse box-it is clean as a whistle-but the clip that pins it down is missing. I had my husband hold it down without the battery being hooked up and it wouldn't crank up at all-it just clicked a lot. Any thoughts? Is there anything else I should look for? The ECM was also replaced about 20k miles ago so that shouldn't even be an issue.
Avatar
Rach80
October 21, 2011.



First of all, you sound like you have a bad alternator that has destroyed 3 batterys. Replace it and see what happens. I bet that the alt is putting out too much voltage and ac ripples that are causing all kinds of erratic reading for the computer.

Roy

ASEMaster6371
Oct 26, 2011.