2nd Gen Non-Engine/Transmission Wiper relay control?

[HCannon]

I replaced the lever that controls the wipers thanking that would fix my problem of only working on high. Didnt change a thing, so there is a control somewhere else? Heater also is the same way, only works on high. These problems related? This is on a 98 3500.

 

[B.G. Smith]

The heater blower speeds are controlled by a resistor block that is mounted in the AC/heater housing under the glove box, it is held in place by a couple of small screws and has a wire terminal connected with 4 or 5 wires. I just replaced mine and it was actually mounted near the bottom of housing. Now the wiper thing I have had too, twice, on mine they called the part a multifunction switch I believe. Don't know much about it as the dealer did that chore. bg

 

[JLandry]

I replaced the lever that controls the wipers thanking that would fix my problem of only working on high. Didnt change a thing, so there is a control somewhere else? Heater also is the same way, only works on high. These problems related? This is on a 98 3500.

In reviewing the wiring diagrams in the Dodge service manual, I don't see how they could be related because they don't share any of the same circuitry. It's probably just an unfortunate coincidence.



Regarding the malfunctioning wipers:



Since you've replaced the multifunction switch, assuming there's nothing wrong with the wiring, that leaves the wiper motor module (concealed under the cowl) as the most likely culprit. The motor module contains automatic resetting circuit breakers, a park switch, and brushes which control the motor speed and wiper parking.



Best regards,



John L.

 

[Missouri Mule]

There is and itermitten wipe module located under the instrument panel, the module is snap-fit onto a single blade bracket, this mite keep the low speed from working. (From 96 factory service manual. )



I take it by lever you put a new Multi-function switch on.

 

[HCannon]

Lots more to this than I thought. Thanks everyone, Hope I get both to working proper. Both are a bother when there is only a mist or not very cold. Thanks everyone.

Harvey

 

[DODGEDADDIE]

Now I've changed the Motor,Switch & now Timer (used tho)
Still no intermediate wipering,,,,!!!? #@$%!

 

[TGVET]

A ways back here, I was told it was the MFS. That was a waste of money and time as it did nothing to fix my non-working intermittent delay and I ended up with a marred steering wheel from the mechanics ratchet handle.



I asked the dealer about it and a tech came out and said it was the wiper motor, think he said there was a TSB but not covered under warranty. I believe he said it was all sold as an assembly. Now 8 years old and nearly 300,000 on the rig, I'm guessing I'll just replace the whole thing, wiper module assembly and the motor.



UNLESS there is someone here who REALLY knows what the problem is.



At least I have a new MFS and the old one as a spare.

 

[Sticks]

All presuming you have a 24 valve having posted in the 2nd Gen section;



TSB

NUMBER: 08-43-99



GROUP: Electrical



DATE: Dec. 17, 1999

SUBJECT:

Central Timer Module Software Update When A Wiper Module Is Replaced



OVERVIEW:

This bulletin involves selectively erasing and reprogramming the Central Timer Module (CTM) with new software (EEPROM changes).



MODELS:

1998 - 1999 (BR/BE) Ram Trucks



NOTE :THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH REMOTE KEYLESS ENTRY.



DISCUSSION:

Due to a design change in MOPAR replacement wiper modules, the CTM must be updated with new software in order to allow the wiper module to function properly. This following Repair Procedure must be performed any time the wiper module is replaced... .



snip

Both the base and the high-line versions of the CTM support the intermittent wipe and wipe-after- wash features, but only the high-line CTM supports the speed sensitive intermittent wipe. The intermittent wipe relay is one of the outputs that both the base and the high-line versions of the CTM can control. Each CTM is programmed to energize or de-energize the intermittent wipe relay in response to certain inputs from the windshield wiper and washer switches and from the windshield wiper motor park switch.



For the speed sensitive intermittent wipe feature, the high-line CTM also uses vehicle speed messages, which are received on the CCD data bus from the Powertrain Control Module (PCM).



Both versions of the CTM are mounted under the driver side end of the instrument panel, inboard of the instrument panel steering column opening...



... When the vehicle is moving at speeds at or below 10 mph, the delay time ranges from 1 to 36 seconds. When the speed rises above 10 mph, the delay times are cut in half for a range of 1/2 to 18 seconds. The speed signal is provided to the CTM from the PCM over the CCD bus... .



Diagnostics

The CTM is fully addressable with the DRB III and it is the recommended method for diagnosis. The CTM reports 6 Diagnostic Trouble Codes. All of the inputs to the CTM can be read with the DRB and the outputs can be actuated. If the inputs are OK and the outputs can be cycled with the DRB, the problem is usually the Central Timer Module.

 

[WalterJ]

I found my "multifunction switch" attached to the underside of the wiper motor, within the cowl of course. 3 snap clips & the cover revealed a field of contacts with a copper wiper. I cleaned all, reapplied a contact grease [non conductive from NAPA or Radio Shack or Electrical supply], bent the 'movable wiper contact finger' for a tad more preload & reassembled. This fix lasted 2 years & just now showing signs of 'double/triple' wipes when set to intermittent service.

This component is easily replaced. Now that this forum reminds me, I'll be shopping for my replacement.

p. s. Look things over or take a pic for orientation when trying to return things to where you thought they were! ... but that's S. O. P. for us backyard mechanics anyway!