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1988 Winnebago, not charging at all.

\015 1988 Winnebago (Winney Minney) will not charge battery.\012This is a camper on a ford E350 with a 460. I took alternator to be checked off vehicle and it put out 14 volts so I replaced regulator but still will not charge while in vehicle. Its been at a mechanics for 2 weeks and he has not found the issue yet so time to do it myself. \0121. Can anyone help me diagnose?\0122. Are any schematics available online (for free preferably). I can read schematics easily.\015 Posted / edited by AnonymousUser on : 18-06-2018

Answers :

If it is just the chassis battery that is not charging, then the battery isolators if bad. Check the output at the back of the alternator and if it is puttin out, then the problem should be at the battery isolator which is somewhere on the vehicle (most likely under the hood). Follow the alternator output and it will go to the battery isolator. At the battery isolator the lead coming from the alternator should read at least 13.5-14.5 volts and if it does, then check the other two leads coming off of the isolator and they should also read the same. The two leads coming off of the isolator should each go to a different battery and they both should read the same but if not then the isolator is bad. If the two leads coming off the isolator do read 13.5-14.5 volts, then there is a problem between the isolator wiring and the battery somewhere. Check the battery to engine ground, engine to chassis grounds and make sure that they are good. The chassis battery is more than likely a chassis ground so make sure that is has a clean connection. Coming off of the starter solenoid are several fusible links and they could be open(blown). There could also be other fusible links on the vehicle so check around the starter and along the wiring harness. Check the harness for frayed/broken/corroded/ or discolored wires as they can cause problems. If the charging system is working the batteries do not need to be new in order to read the correct charging voltage.
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