Search results

Wire rubbing shorted somewhere. Bad lbcd under spare tire.

The lbcd is involved with voltage regulation. When you put battery voltage directly to the front regulator terminal you are bypassing all of that. If you have battery voltage at that terminal the alt should put out proper voltage. Did you make sure the alt had a good ground strap. Ive seen...

Maybe bad lbcd. Jump 24v from the battery terminal to the front terminal on the regulator see if it comes up

Voltage drops on the lbcd in and out? Have you checked your batteries and their connection?

If you dont have 24 volts at the alternator 24v regulator excite terminal the alternator will just spin and not make any power. If something is connected wrong that could be the cause though. Go the the lbcd and measure the 12 volt in post and the 12 volt out post. If there is no 12v at the in...

So you took the lead off the regulator 24v terminal and measured it and there is no voltage at the lead when the truck is running?

A1 trucks have other issues. Could be voltage regulator/alternator issue. Could be related to the polarity charging box under the spare tire. You can unplug the mil connector from the polarity box and see if symptoms change. See if there is 24v at the front terminal on the regulator marked 24v...