I have a 98 Ram Sport, 360 engine, 4x4, shortbox, automatic

​​​​​​So when the wipers are on constant wiping they work fine at both speeds. But when you turn on the intermittent settings the wipers tend to stop and start sporadically. They will go ... Let's say 90% of the way up the window and stop, wait a couple seconds, and then go back down, then maybe the next time they'll go 80% up and stop, and the cycle keeps repeating. It's done this since I owned the truck but now I need to fix it for mechanical inspection.

I had the plastics under the steering wheel taken off and I can't see anything damaged there (I just adjusted the cable for showing what gear I'm in so I was already going in there).

I checked the relays under the hood and swapped a couple around and can't say I've noticed any change. When under intermittent I can hear the relay click, the wiper moves and eventually stops, and then the relay clicks again and the wiper moves. The relay clicking is consistent and I can't manage to make it do anything weird with tugging or pulling any wires. (As in its not snapping on and off but rather just every 2-3 seconds it clicks and the wipers immediately move). I removed the wiper motor and arms and we sprayed with contact cleaner and didn't see any improvement there. So my mind says its probably the motor messing up but alot of people have trouble with the multi switch. I have another 2nd gen Ram (I think like a 95) I can pull parts off but trying to find a way to tell what to replace. Anyone have any ideas where to go from here? The only other weird thing is when the wipers are on intermittent the radio buzzes but my motor ground is good.


Then the horn thing. Horn didn't work. I checked the relays and they were fine, then checked the fuse and it was burnt out. The old owner has the AC disconnected so I figured it might have blown it. Hit the horn and everything is fine. Out of nowhere the horn honks once and I figure alright ok whatever. I must have did something. Then 10 minutes later the horn is fully on and doesn't come off. Had to pull either the relay or the fuse to make it stop. This truck has an aftermarket immobilizer so I don't know if that could acted up but looking for other options.

Thanks for reading.

 

I think the wipers are controlled by the central timer module.... Grab the service manual for you truck from here. Wiring diagrams are in section 8W.

 

Sounds like the wipers are not returning to their park position. There is a switch inside the wiper motor housing that signals to the timer module to keep the wiper relay on until the wipers are down in the park position. 12V from the wiper park sense switch keeps the relay on, when the switch connects to ground the relay turns off. The actual intermittent timer just gets the wipers out of the park position and then relies on the wiper park sense to bring them back to the bottom.

Edit: Looking at the wiring diagram a little closer the wiper park does not use the relay but rather gets power via a fused connection and directly powers the wiper motor. Basic function is the same though.

 

Ok so I've tore into this truck and I can't seem to make it work. Horn I figured out. The switch is just stuck in the dash so I'm running an external switch.

The wipers though. Holy moly it's making me tear my hair out. So I've torn into my spare truck and pulled everything under the sun out of it to no gain. I've replaced the multi switch for the wipers, the CTM under the dash, the wiper motor, the relays, the fuses... I've bypassed the junction connector no.2 pins and tied then all together externally... Nothing is fixing these wipers!

On high setting I get 12v on the red and white wire, They work on the fast mode. On the other constant setting I get brown and white power and everything is fine and they work on the slower mode. I always have power on the blue wire whenever the key is on. Green wire I've tracked back to the no.2 connector and I get a pulse of power but not constant.

I can hear the relay clicking. Then the motor spins for some part of a turn, then I hear the relay click off and they stop wherever they are. It's around this time I get a brief pulse of power but then nothing. This is I'm assuming the park circuit for the motor. I can hear contacts in the motor clicking on and off where I assume park is (took the blades arms off) but im not getting the park.

 

Chrysler probably had a competition in 1998 who can make the most convoluted wiring design .... Here's how I read the wiring diagram:

In the park position, nothing turned on, the switch inside the wiper connects everything on joint connector 2 to ground by linking pin 2 (dark green) to pin 21 (black).

With the wipers not in park pin 2 gets 12V from pin 3 (dark blue). The 12V signals to the control module that the wiper is not yet in park so don't start the timer for the interval yet if running in interval mode. It also sends power via the load side of the relay "normally off" pin 87A (dark green) to pin 30 (red/black). Red/black goes through the MF switch coming in pin 7 or 8 and going out pin 6 or 9 (brown/white). 8 and 9 are used in interval mode and 7 and 6 when the wipers are turned off from any mode. Brown/white powers the wiper motor in slow speed. Once the wipers are in park there is no power to pin 2 on the wiper motor and everything downstream to brown/white and the wipers stay in the park position.

From your description:
- On high setting I get 12v on the red and white wire, They work on the fast mode.
* Works as designed. Should be yellow not white though but they are easy to misread on an old truck.

- On the other constant setting I get brown and white power and everything is fine and they work on the slower mode.
* Works correctly as well.

- I always have power on the blue wire whenever the key is on.
* Check !

- Green wire I've tracked back to the no.2 connector and I get a pulse of power but not constant.
* You should see power when the wipers are out of park but not when in park. It sounds like that is happening.

Check downstream from the dark green wire/pin2 on the wiper motor. You should see the same pulse at pin 87A of the wiper motor relay. The relay is only used for interval mode so you can remove it. Pin 87A should pulse with wipers running in the slow setting.

The wipers start moving in interval mode so everything after pin 30 on the relay (which gets the wipers out of park when energized) is working.

My hunch is the connection between pin 2 on the wiper motor and pin 87A at the relay is broken.

 

No luck on that end either. Great continuity on those pins just not parking still. Switched through all the parts and no change again, then put them back on the old truck and both motors just spin nonstop on that truck so god God knows what the problem is for that truck. Switched then back to the current truck and it went back to its old shenanigans. Under the relay base I have the green wires between the clock/relay/wiper motor cut and crimped together so those are all making good connection.

 

And now I've done did it.

Whatever I did I found out that I had no power on pin 86 for the coil and I tried to check it out and now I've lost any intermittent wiper, let alone park problems.


But I've verified that every single wire in the circuit goes from where it should start to where it should end...

 

Looks like that wire is messed up somewhere.

 

Going back to the initial problem, did the wipers not return all the time or only when interval mode was turned on ? And you did change the multi-function switch already, right ?

 

Wipers did not return at any point. On any mode once I turn them off they stop wherever they week like.

CTM was replaced.
Multifunction was replaced.
Motor was replaced.Relay was replaced.
All wiring continuity checks were fine.