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Car Forum / Dodge / Dodge Trucks / April 2008Electrical troubleshooting wipers on 86 Ramcharger
My wipers stopped the other day. I started at the switch and worked my way up to the motor, I am pretty sure the problem is in the motor itself, but it might be the intermittent control module. I don't know how to test that, though, and hoping one of you might have some insight. This is why I think the switch is OK: - The switch still works for the washer pump (press down on this switch from any position). - When moving the switch into any of the on positions, I can hear the intermittent controller click. I think the control arms and linkages are OK because the arms can't be moved. If the intermittent controller can be called good because it clicks (can it? that's one question) then the problem is likely at the motor or between the IC and the motor. What I could use here are the electrical test procedures for the intermittent controller and the wiper motor harness. I'd love to get lucky and find out it's just brushes :) R(k) Might be helpful if you included pertinent details on the truck you're talking about... > My wipers stopped the other day. I started at the switch and worked my > way up to the motor, I am pretty sure the problem is in the motor [quoted text clipped - 21 lines] > > R(k) Yes, you're right ;) 86 Dodge Ramcharger SE, 360 4x4. R(k) > Might be helpful if you included pertinent details on the truck you're > talking about... [quoted text clipped - 28 lines] > > > R(k) what part of the header to his post did u miss.....................I cant believe engine size matters to his question? I would think that his questions would apply to anyone looking for the same problem, regardless of engine size etc, cause that's all the extra info he posted. So does that make this more relevant and you will now provide an answer to his question? Somehow I doubt it > Might be helpful if you included pertinent details on the truck you're > talking about... [quoted text clipped - 24 lines] >> >> R(k) >what part of the header to his post did u miss.....................I cant >believe engine size matters to his question? I would think that his [quoted text clipped - 30 lines] >>> >>> R(k) Is the power fuse to the wipers still good? Could be control power is from a different source. wag Fuse is good. Power is def being sent through the switch to the intermittent controller, so I think the switch is ok too. The intermittent is clicking when powered, so it MAY be good but I don't have the test procedures to verify. R(k) > Is the power fuse to the wipers still good? Could be control power > is from a different source. wag On Thu, 10 Apr 2008 14:52:18 -0700, grimisme wrote: > Fuse is good. Power is def being sent through the switch to the > intermittent controller, so I think the switch is ok too. The [quoted text clipped - 5 lines] >> Is the power fuse to the wipers still good? Could be control power >> is from a different source. wag break out your test light and connected it to ground then probe the "hot" wire going to the motor. unplug it if you need to. with the light connected between the power and ground when you cycle your wiper switch you should see your test light "light up" should blink as the intermittent wiper controller does its thing and should burn steady on low/high. consult your wiring diagram if in doubt what wires are the "hot" and "ground"....best i can do for you as i dont have a wiring diagram or a 86 ram charger to look at.  SignatureChris Update: I pulled the motor off the truck last night. I test for voltage at the harness with the switch on, and I got a reading. On this wiper motor is a little module with 5 spade slots that plug into the motor just above where the harness connects. I took that off, and plugged the motor back in and the motor works if I manually ground one of the spades. On the motor body, there are 4 spades for the harness, lined up like this: | | | | and checking continuity against a 5th spade the module plugs into, the outer two have continuity with the 5th one, and the inner two with each other only. Since the module snaps onto all 5, I imagine it is acting kind of like a bus and distributing power to the other connections. Testing continuity on this module fails, none of the slots have continuity with each other which I would expect if that's what it is doing. I think this may be a noise suppression module, inside are what look like cylindrical capacitors, the only marking I can make out on one is 250v and MAC. Anyway, heading to the wrecking yard in a bit as the module is not available without a new motor. And I'm too cheap for that, especially since the motor works ;) Update 2: Not going to the wrecking yard. After my last post, I thought about what was actually happening. I went back out and plugged that module in then ran a jumper from the motor mount plate to ground. The motor does exactly what it should at all switch positions. Take the jumper off, the motor stops. Looks like I have a bad ground somewhere. Will post back with conclusion. > what part of the header to his post did u miss.....................I cant > believe engine size matters to his question? I would think that his > questions would apply to anyone looking for the same problem, regardless > of engine size etc, cause that's all the extra info he posted. So does > that make this more relevant and you will now provide an answer to his > question? Somehow I doubt it. I see you have yet provided the answer yourself. >> Might be helpful if you included pertinent details on the truck you're >> talking about... [quoted text clipped - 24 lines] >>> >>> R(k) Flames aside, anyone have ideas? > Flames aside, anyone have ideas? Geta friend and a meter, have the friend hit the switch, see if there is anything going on between the controler and the motor with the meter. |
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