Intermittent wiper module repaired

[The86manche]

2 hours ago, GonzoTheGreat said:

I'm semi local, with intermittent wipers. You just need someone to plug them in and test?

Yes please, id like to fix up a few more so we can do a big batch test.

But so far i have about 5 that I have tested good.

I have found that these modules are suuupperr sensitive to their wiring connections. 

[GonzoTheGreat]

Cool. Ill message you my info and we'll find a weekend. 

[A-man930]

14 minutes ago, The86manche said:

I have found that these modules are suuupperr sensitive to their wiring connections. 

 

Can you elaborate on this? 

[eaglescout526]

56 minutes ago, A-man930 said:

 

Can you elaborate on this? 

Ooo I got one. My 84 XJ one day was working fine for the wiper module, something got wet and now it won’t work right. It just constantly cycles and keeps tripping the circuit breaker. And I’ve tried other modules and some work and some don’t even though they all test fine in my MJ. So I’ve got some digging to do for the wiring but that’s and example. 

[The86manche]

5 hours ago, eaglescout526 said:

Ooo I got one. My 84 XJ one day was working fine for the wiper module, something got wet and now it won’t work right. It just constantly cycles and keeps tripping the circuit breaker. And I’ve tried other modules and some work and some don’t even though they all test fine in my MJ. So I’ve got some digging to do for the wiring but that’s and example. 

A perfect example. But in my case, the wiper motor shakes and moves just enough to jostle the wires around which causes bad readings. I had a good module working on the lowest delay setting but the linkage would cause the wires to shake and caused a contact issue which made it run constant instead.

The wiring on these are super simple but the grounds need to be checked. The the contacts for the connectors that plug into the module from the harness I have found wiggle around a lot and may cause instances of poor connections too.

Lots of simple variables that may be overlooked.

And is why I would love a love test sorce from a truck instead of a test stand to se, hopefully, the same results, not different. But if I get different results I can find out why.

Is it the connectors on the harness?

Does the wiper motor need a much stronger ground? Pinched wire? Failing  wiper switch? 

[The86manche]

Big thumbs and excitement cause for lots of typos.. haha

[The86manche]

5 hours ago, eaglescout526 said:

Ooo I got one. My 84 XJ one day was working fine for the wiper module, something got wet and now it won’t work right. It just constantly cycles and keeps tripping the circuit breaker. And I’ve tried other modules and some work and some don’t even though they all test fine in my MJ. So I’ve got some digging to do for the wiring but that’s and example. 

Also id say first check the connector going into the wiper motor if you have not yet.

The circut breaker has 3 wires from it. 2 green wires with a black chase, one of those goes to the blue wire on the wiper motor, One goes to the wiper module, and then a brown wire that goes to accessory power on the column. So it could even be a an exposed wire in the column for the breaker thats grounding out.

Just my thoughts on that

[eaglescout526]

29 minutes ago, The86manche said:

Also id say first check the connector going into the wiper motor if you have not yet.

The circut breaker has 3 wires from it. 2 green wires with a black chase, one of those goes to the blue wire on the wiper motor, One goes to the wiper module, and then a brown wire that goes to accessory power on the column. So it could even be a an exposed wire in the column for the breaker thats grounding out.

Just my thoughts on that

 

I think it’s the wire in the column somewhere. Cause I checked the wiper motor and the switch and even swapped switches too and still the same results. And I did have to root around with the column and its ignition switch so it’s probably that wire that goes there. I even did a continuity test from that wire to body and it grounds out so I know where it lies. Just need to pull the XJ out and address it. 

 

[Spinnakerblue89]

The module on my '93 ZJ lost its lower speeds but not full and max. I disassembled it and found no obvious issues- possibly a capacitor. Except my soldering station requires calibration! 

[AnotherOldJeepGuy]

Look closely at the contacts for the solenoid on the control board, I believe that was my issue...

[The86manche]

Alright! Back after meeting up with @GonzoTheGreat! With his help i was able to test out a batch of repaired modules to great, and interesting, success!

We did discover that there were a few modules that had contact issues with the connectors in the truck. But that may be because the cases were not properly secured back together. 

So ill clean up some contacts, seal up the boxes give them one last test and then Ill have 5 modules up for sale.

I have not figured out a price yet..

[The86manche]

And I have a stack of others to trouble shoot. Currently learning about cmos logic chips in case some have failed.

I'm slowly approaching a reverse engineering of these boards..

[A-man930]

Love it. Have you reached any other "markets" for these? 

[The86manche]

16 hours ago, A-man930 said:

Love it. Have you reached any other "markets" for these? 

Do you mean by other jeep models that use these boxes too? Or other platforms?

I would say I'm still in the early stages of this operation haha

[A-man930]

23 minutes ago, The86manche said:

Do you mean by other jeep models that use these boxes too? Or other platforms?

I would say I'm still in the early stages of this operation haha

 

I think this is a common device used in any make/model with a Saginaw column.  GM trucks, for instance. 

[Eagle_SX4]

55 minutes ago, A-man930 said:

 

I think this is a common device used in any make/model with a Saginaw column.  GM trucks, for instance. 

I know that GM trucks do not use an intermittent module like the Jeeps do. My dad has a 89 Chevy and the intermittent circuit is housed in the wiper motor.

[The86manche]

4 hours ago, Eagle_SX4 said:

I know that GM trucks do not use an intermittent module like the Jeeps do. My dad has a 89 Chevy and the intermittent circuit is housed in the wiper motor.

Correct. The C and K series trucks used the same column and even the same connectors as the jeeps for the modules. Gm just plugged then together.

I was able to confirm this while I was over at gonzos place as he had a c series truck in the driveway and we had a look.

[The86manche]

5 hours ago, A-man930 said:

 

I think this is a common device used in any make/model with a Saginaw column.  GM trucks, for instance. 

Its primarily the jeep line of vehicles, almost any of them that had that Saginaw column. Even the cjs had these boxes.

I'm speculating here but I believe amc didnt have the means to do an integrated wiper motor like gm did. So their best option were these little boxes loaded with capacitors. 

[A-man930]

5 hours ago, Eagle_SX4 said:

I know that GM trucks do not use an intermittent module like the Jeeps do. My dad has a 89 Chevy and the intermittent circuit is housed in the wiper motor.

 

Strange... Maybe S10 then?  I could be remembering wrong... 

Anyway, there's plenty of Jeeps around that could use it.  Just throwing it out there.  

[Eagle_SX4]

1 hour ago, The86manche said:

I'm speculating here but I believe amc didnt have the means to do an integrated wiper motor like gm did. So their best option were these little boxes loaded with capacitors. 

Yeah AMC used a similar inline box which they bought from Ford and was used in a lot of 1970's era Ford's and 1980's AMC's.