So I have this electrical wire in my truck that is supposed to have a voltage between 2.25 and 2.5. My multimeter is showing the wire has 2.59 volts. The workshop manual says to repair the wire if it’s not within the range above. Anyway, what makes wires have more voltage than it needs? What exactly am I going to repair? A different wire making contact with the 2.59 wire?
Causes of Electrical Wire with Higher Voltage than Required?
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by PE_T, Apr 20, 2019.
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I have two yellow check engine lights on my 2014 Freightliner Cascadia DD15. I am using Detroit’s workshop manual, and I have identified the cable that is the problem. It’s a cable from the DEF metering unit connecting to the ACM (120-pin connector). I did a continuity test from the metering unit connector pin to the ACM pin, and it passed. Nothing looked damaged. I’m not sure what exactly to look for. While driving, sometimes the check engine light disappears for a few seconds, but then it returns. There is an engine derate of 10%. I am stuck on the very last step (5b).
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Last edited: Apr 21, 2019
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