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Bad disconnect relay. Replaced or bypassed and all was good.

I disconnected the top plug on the reverse polarity box and it stopped acting up for the time being. Unfortunately I'm dealing with another major issue on this one but the first issue hasn't returned. The M1088A1R had an intermittent no charge light issue but only after it warmed up and the...

Overview Enlarged by Module - 1/2/3/4 There's no relays or related controls under or behind the PDP modules, it's a rather spacious design. The transmission controller is mounted underneath like all the trucks but that's it. I dug into the dash more today and started cross comparing...

I'm concluding your info is for the earlier generation A1 trucks with the CAT 3126 up to 2005. The truck I have is 2006 which has the CAT C7 and WEC 4/5 so it's a complete different setup. I do have a digital copy of the early A1 generation TM's but they've been no help on the issue due to the...

Pulled it and cleaned all contacts for sale measure. Power is good now, no reset issue. Now..click in the dash no crank issue. Onwards and upwards!

That's my next step actually. Trace the issue from the batteries on up. [thumbzup]

I have a 2006 M1078A1R that is having an odd issue related to the battery disconnect box. This truck is current gen so no TM help. Batteries are fresh, wired correctly, and voltages checked. Turning the battery disconnect to "on" will result in a satisfying click for power. This click sounds...