Question about 1997 Dodge Ram
The problem started when the voltage regulator went out and there was a spike in the charging system. the delay section on the wipers quit working. now it keeps blowing the 20 amp fuse so I replaced it with a 25 amp. now the wipers operate but will not turn off with the switch in the off position. also as they cycle the dash lights dim at the end of the stroke. I tried a new switch and I tried a new motor---no difference. I am now wondering what else could be in the circuit that could cause this. I don't have a wiring schematic for the wipers and so I'm not sure where else to look. thanks for any input in advance.
If your voltage regulater in the charging system (distributor, altinater, battery, PCM) was replaced then the entire PCM where the volt. regulator nis held should have been replaced, so hopefully it was.
To check the charging system make sure when the truck is running the battery reads 13.5 to 14.5 volts (may go as high as 16) and when not running the battery should be at 12 volts. Any high and low voltages meen that the regulater or PCM are still bad and could be your problem.
to check the wiper circuit, pull its fuse and place a continuity tester over the fuse positions terminals, should have continuity, if not you have a wiring issue and the circuit needs tested at different sections until the break is found. Also the tester to check the wipers ground, place one test lead on a known/good grounding spot and the other on your wiper ground if there is no continuity than you are not grounded and you have to find the short.
You can get a Haynes repair manual that has all circuit diagrams in it, if your able to read circuit diagrams, hope this helps.
Posted on Apr 03, 2010
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Posted on Jan 02, 2017
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