Electrical issue Power Wagon
#2697502
09/14/19 03:17 PM
09/14/19 03:17 PM
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Joined: Jan 2003
Posts: 4,366 Cleveland, Ohio
northcoastmopar
OP
master
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OP
master
Joined: Jan 2003
Posts: 4,366
Cleveland, Ohio
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Hi, have a 73 Power Wagon and I’m trying to track an electrical issue.. When I turn on the headlights the wiper motor runs. It doesn’t matter what position the ignition key is in and turning the wiper motor switch on or off has no effect on it, it continues to run. The wipers don’t actually work, but the motor does run.
I pulled the dash and nothing looks hacked or spliced, everything looks factory from a wiring standpoint. I checked all the harness plugs at the firewall under the hood and everything is clean, nothing is corroded or burnt.
Don’t know much about the truck, got it last year on eBay and just starting to mess with it .
Any ideas on what to look at first?
Thanks in advance
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Re: Electrical issue Power Wagon
[Re: northcoastmopar]
#2698134
09/16/19 04:31 PM
09/16/19 04:31 PM
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Joined: Jan 2003
Posts: 18,389 UPPER MICHIGAN, MARQUETTE COUN...
NITROUSN
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 18,389
UPPER MICHIGAN, MARQUETTE COUN...
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The wipers don’t actually work, but the motor does run. So I have to assume when you make this comment there is no linkage attached to the motor? Wipers are keyed power and the headlights are constant power. I would unplug the motor and switch first turn on the headlights and see what wire is now hot. Then trace it back and you will most likely find the problem.
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Re: Electrical issue Power Wagon
[Re: NITROUSN]
#2708516
10/20/19 12:06 PM
10/20/19 12:06 PM
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Joined: Jan 2003
Posts: 4,366 Cleveland, Ohio
northcoastmopar
OP
master
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OP
master
Joined: Jan 2003
Posts: 4,366
Cleveland, Ohio
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Finally got a chance to look at this again.
I pulled the cowl cover and the wiper arms are connected. I moved the motor around a bit and the wiper arms pivots now move. The motor was seized.
However....even without a key in the ignition, the wiper motor comes on when I turn on the headlights. So the motor is getting power even without a key. I’ll trace back from the wiper motor and see which wire is hot. The wiper switch has no effect on anything.
Last edited by northcoastmopar; 10/20/19 12:30 PM.
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Re: Electrical issue Power Wagon
[Re: jcruse64]
#2708746
10/21/19 07:08 AM
10/21/19 07:08 AM
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Joined: Sep 2003
Posts: 7,828 east side of Ohio
basketcase
master
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master
Joined: Sep 2003
Posts: 7,828
east side of Ohio
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I've done that, went to go to work one morning and wipers wouldn't work. They worked the day before. Added a ground from the motor to the firewall and problem fixed. Only one I ever had to do that to in the dozen or more D/W series trucks I've had. But his problem is the motor running when the headlights come on. Wonder if there is a crossed wire....maybe at the bulkhead connector?
Dave
1981 Dodge D150 360 auto
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Re: Electrical issue Power Wagon
[Re: northcoastmopar]
#2709696
10/24/19 12:44 AM
10/24/19 12:44 AM
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Joined: Mar 2005
Posts: 1,373 Rancho Cucamonga, CA
D_C
pro stock
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pro stock
Joined: Mar 2005
Posts: 1,373
Rancho Cucamonga, CA
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Wondered if the wiper motor wiring is shorted to some other hot wire (insulation burned or scuffed/chaffed) ? Have you disconnected the wiper motor? With the connector disconnected it shouldn’t run unless the wiring IS shorted to a Hot wire somewhere in the harness.
Or, if the wiper motor does not meet resistance, like when it bottoms out, it cannot “Park”. When it “Parks” it shuts the motor off. Otherwise, it just runs and runs.
I (also) own a ‘74 W200.
Last edited by D_C; 10/24/19 12:54 AM.
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