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I only have one wiper speed. wiper motor tests good hooked up to a battery and has more than one speed (I forget how many)
Using a voltmeter if I go to ground and to the body of the switch or the wire that comes off the switch I get 8-10.5V with just the key and switch on.
Internally shorted switch?
Bought a new one and it does the same. I don't see why the switch body would be charged as it goes all to hell if you touch the dash (as you might expect)
New switch bad too?
I don't see a Intermittent relay box in between the plug from the harness and the switch. Could it be the wrong switch?
85 J20/360 amc
91.5 Dodge 250 Cummins intercooled 4X4
79 International Scout II with a P-Pump 95 5.9 Cummins.
I'm fuzzy on 85 FSJs. I think you must have the final style dash with the 3 rectangular gauge pods as opposed to the mid-70s to early 80s 3 circle gauge pods, is that right? Here's a pic that points out the location of the intermittent wiper relay. Does this match what you have? https://goo.gl/images/akQEbp
73 J4000. 360, MC 2100, T18A, D20, stock closed knuckle Dana 44 front, 60-2 rear. Warn Lock-O-Matics, Warn/Belleview electric winch, true duals with glasspacks, old-school front diff skid plate, used 265 Toyos on 16" AR wheels.
My 85 was from Michigan and the cab and frame were a total loss. I lifted the bed off to look at the frame and the back of the frame fell off! I'm actually using a 78 cab and a different frame (luckily I live near Jake and Jackie), but re-used the full 85 harness, switches, converted the firewall for the newer 85 wiper motor, and used the full 85 drive train/360 AMC. I'm using the gauge cluster that was in the 85 truck when I bought it and it's 3 round gauges, not square. The wiper switch uses the half moon shaped plug. Pictures Ive seen look like there should be a relay that plugs in between the harness plug and the wiper switch. I don't see that on my truck, but I do think my switch is for intermittent. I've seen pictures of the rectangular relay box like I think your picture is showing and I don't think I have one of those. I'll look again later this morning. It could be hiding somewhere. It's been last year since I put the harness in, so I don't really remember at this point.
I'm half wondering if I have a hot wire shorting out somewhere on the truck and that's what I read with the ohm meter between the dash ground and the switch body. Could be anywhere if that's the case. I've been reading on the internet, but I always wind up with a problem no one else has ever had...ha. I can probably figure out how to wire in a toggle switch for wipers, but I'd rather not if possible. I may have 2 problems as I still only have one wiper speed which is the fast one. I can leave the switch hanging under the dash not touching anything and the one speed works fine.
85 J20/360 amc
91.5 Dodge 250 Cummins intercooled 4X4
79 International Scout II with a P-Pump 95 5.9 Cummins.
I looked around and still didn't find a relay anywhere. Would not having a relay with a intermittent switch cause my problems? I'm thinking the relay should look like the 2nd picture down in this old thread.
I did run a jumper cable straight from the battery and checked between the switch and the battery ground and it still reads voltage, so it's the switch body that is hot.
85 J20/360 amc
91.5 Dodge 250 Cummins intercooled 4X4
79 International Scout II with a P-Pump 95 5.9 Cummins.
arlingtonslim wrote:I looked around and still didn't find a relay anywhere. Would not having a relay with a intermittent switch cause my problems? I'm thinking the relay should look like the 2nd picture down in this old thread.
I'm not totally sure but I'm leaning towards yes. Wish I could help more but I'll need to leave it to the electrical pros!
73 J4000. 360, MC 2100, T18A, D20, stock closed knuckle Dana 44 front, 60-2 rear. Warn Lock-O-Matics, Warn/Belleview electric winch, true duals with glasspacks, old-school front diff skid plate, used 265 Toyos on 16" AR wheels.
Finally got back on my J20 project. I've been driving it around, but just when it's pretty clear. I'm getting it ready to use this winter while I decommission my old dodge cummins for repairs. I found a guy on Ebay selling a intermittent wiper switch and control box/harness from a 70's bronco. I bought it and plug and play wipers are back online. I suppose buying a non-intermittent switch would have also fixed my problem. I re-used my jeep switch so the length would be the same in the dash. I just had a intermittent switch, but was missing the control box for it. Now on to the fan motor.........
85 J20/360 amc
91.5 Dodge 250 Cummins intercooled 4X4
79 International Scout II with a P-Pump 95 5.9 Cummins.