electrical issue M915A1

[Glen Donnach]

I just bought an M915a1 from the MO Guard. Great shape, low miles, but I have an electrical problem. I have to jump it to start it and then after removing the cable, i have no guages that work, no lights, etc .
I think it might be the ignition switch, has anyone had problems with the Pollak 2 position ignition switch?

 

[wreckerman893]

Could be a couple of issues.

One....... the alternator is bad and is not charging so no power to make the gauges. The batteries could also be very dead.

Two.....could in fact be the ignition switch.

Three.....could be a wire loose somewhere under the dash.

I would have the batteries tested first and see if they can be charged....all four have to be hot.

If you still get no gauge activity then you can buy a switch from NAPA (that is where I got the one for my former M915) and try that.

Good luck....they are great trucks.

 

[reb87]

your batteries are so dead they will not take a charge or some are shorted. Put two new batteries in(disconnect all original batteries ), making sure to hook your slave cable leads and 12v leads correctly...

 

[Glen Donnach]

Thanks gentleman. I will test batteries first, then work back to the rest. Thanks for the wisdom!!