I found this substitute intermittent wiper module that will work in the 60 series wiper circuit with a small interfacing connector. Use at your own risk.
60 series intermittent wiper module (1 Viewer)
- Thread starter Engineer8000
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This means you'll get a specified 'Wiper Delay' on the low setting?
- Thread starter
- #3
If your truck has intermittent wipers and the module has failed (like many of the early mechanical gear driven ones), the OEM Toyota module is NLA. This will replace the Toyota module.
I'm curious to see if the intermittent module is something that can be refurbished like I do with the driver's window relay boxes. It'd be great to be able to add another service to keep some of these OEM parts still alive. There was a thread a few years back about modifying the OEM module to even allow for a variable delay the way many new vehicles have. I'm going to have to dig that up and take a look at the pics to see if it looks promising.
Potentially I could offer a refurb and/or upgrade service that would add the variable delay.
Potentially I could offer a refurb and/or upgrade service that would add the variable delay.
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- Thread starter
- #6
The later electronic version can be modified as you describe. The gear driven one cannot. The late electronic version will function in place of the early mechanical one but they are both nla new. The one I posted above is used I got just for testing but they are available new for less than the used Toyota ones sell for, if you can find one.
Beat me to the punch. I managed to find the thread and came to the same conclusion. That said, with the electronic version also being NLA it does appear I can refurbish it.
Now I need to find a known inoperable unit and experiment with it. If anyone has got one P/N 85940-90A04 (P/N 85940-90A02 may be do-able as well; but I'd need to compare the two to be sure) please PM me instead of throwing it out and I'll be happy to pay for the ride.
Do you mind detailing a bit what you did to make the connector between the electronic relay and the pins in the fj60? I found a cheap salvage of the MB510925 Intermittent Wiper Relay on eBay on eBay for $9 shipped and want to try out your solution in addition to rebuilding the original, which is failed on intermittent.
Brilliant design on the original, just wish it was serviceable as noted. Greasing mine up did nothing.
@Spook50 did you ever get anywhere on this? I can send you my unit l once we get to summer but I need the wipers until then. Super simple design, should be serviceable, I may try to source the resistors and solder new ones in and see if that is what failed.
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- #10
If you make up the adapter connector as shown in the OP, it will work. If you don't have the equipment to do that PM me and I can maybe send you one.
I haven't, actually. I've been needing to order more relays for my window unit service and am on the razor's edge of (FINALLY!) finalizing my solid state gauge regulator project, so I would definitely love to get my hands on an electronic wiper module to see if I can identify failure points and repair opportunities.
Excellent news on the gauge regulator project!
@taoofbean Searching for a non-mechanical relay solution is probably still the best idea, but here's some stuff other than greasing that might help the mechanical module:
-Clean the contacts with a tiny file or sandpaper
-Bend the contact spring arm if it got out of whack
-Desolder the resistors and check them with a DMM - refer to the colored stripes to know what the resistance should be. There's calculators online that translate the colored stripes
-Used compressed air to blow out the motor through the holes in the case. Following up with some DeOxit or electronics-safe lubricant might be helpful too.
@Engineer8000 The Toyota electronic relays should be able to be tuned for a desired speed, wouldn't you agree? Some component changes would do it if it's a fully discreet circuit. If it's something like a 555 timer chip, a trimpot might work for having an adjustable speed.
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- #13
There is a thread on here where someone did just that. Used a pot to adjust timing.
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- #14
I believe the 43K resistor was replaced with a POT.
Your image in the OP shows a 4 pin connector, the original relay had 5 pins, four in a cluster and then a fifth all by itself. I can work to source a 4 pin plug and route the wires like like you show but that would leave the fifth pin dangling. EDIT - 5th pin appears to be a ground. Can likely just leave the ground unplugged with the new setup. once I find a 4 pin connector that just slides in place over the original pins when connecting the electrical mopar relay;
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@Engineer8000 and others...
Would it be worth my time to design and fab brand new PC boards for an intermittent wiper relay circuit? I would populate the PCB with components and do all the soldering. I ship it, customer drops it into the plastic shell, replacing the entire original guts of the unit.
Would it be worth my time to design and fab brand new PC boards for an intermittent wiper relay circuit? I would populate the PCB with components and do all the soldering. I ship it, customer drops it into the plastic shell, replacing the entire original guts of the unit.
I want to say yes but what would be your investment in time and resources to make it worthwhile and cost effective for the rest of us?
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- #18
Yes, you do not need the separate single wire ground.
TBD. Just trying to gauge interest. If I had to shoot from the hip I'd say the final product would retail for $30-60.
Count me in. 
