cj_sackett Posted May 17, 2016 Share Posted May 17, 2016 Hello experts, couple of months ago my Comanche died, would crank till the sun went down but wouldn't fire. Replaced everything spark side and it ended up being the ECU. Plugged it in and it fired right up, ran great (other than mud in the intake from a big puddle) then I was driving and it just quit. Radio, lights, all electronics worked just fine but the truck died, same issue. Today I pulled the ECU out and pulled the back off. The R125 (resistor/transistor not sure which) is broken, I didn't take apart the first ECU so I don't know if it's the same problem but I'm assuming it is. Does anyone know what this is and/or what's causing this problem? 89 Comanche Factory 2WD, converted to 4WD 2.5l, AX5 manual Link to comment Share on other sites More sharing options...
cruiser54 Posted May 18, 2016 Share Posted May 18, 2016 Bad grounds and poor connections can cause electrical components to heat up and fail. Link to comment Share on other sites More sharing options...
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