1998 Dodge Ram Wiring Diagram

[Henry Grimard]

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I have the above mentioned truck. The ONLY guage that works is the tach. I sent the ECM to cardone to be R&R and they sent it back saying it was fine. I obviously have some sort of wiring issue but weve literaly been tracing wires and making sure theres grounds and 5 volt references and 12 volts....etc for a few months now. Any typical places where a wire might have broken? Any other ideas what might be wrong? Im also looking for a wiring diagram for the wires behind the guage cluster. Those 2 square plugs that the guage cluster plugs into.Any help would be fantastic

Ive got a buddy with the same exact truck. I tried his cluster and it did the same thing. I also did the cluster check on mine and the guages worked as they should for the test just not any other time. I would really like to get another harness I just dont want to spend 200.00+ dollars on something that may or may not work.

I had a similar issue a while back. Most of mine were working however. Turned out mine was the ECM. Not sying thats your problem. I think we need a little more help from the more electronicly inclined. i am a novice when it come to that stuff. Did you check for any trouble codes?

I pulled the codes but I dont know how many of them are legit to be honest. I sent the box on the firewall (PCM?) to cardone and they said it was fine. The problem is my truck has a PCM and an ECM and unfortunately everyone thinks its the same thing. I got a wireing diagram from the dealership for my cluster but theyre talking about pin 32 and a box having 50 pins but the one on the firewall has 3 seperate plugs with around 30 pins each.......????????

Ill pull the codes again tomorrow but I did not have a 606 code. Im glad to hear im correct on the ecm/pcm thing I just dont understand why soooo many places have NO CLUE. for all the auto parts stores Ive checked if I say ecm or pcm they refer to the pcm only (on firewall) Including cardone......lol Anyway, I believe my problem lies with the ECM or wires going to it.

Well I can pass you off to another gent over on www.dieseltrucksite.com goes by the name of csynder he does conversions all the time with 12V and 24V in different bodies...His profile over on diesel truck site =44

Shouldn't hurt it but it will most likely not work right because the VIN numbers won't match... Dodge insures that all computers and software are right and proper by using VIN number locking schemes. So if the VIN number doesn't match it might not work...

I have read through both posts here and at dts and nobody has asked the basic questions.Did you do anything to the rig before this happened replace vp44 ecm or add on any accessories that tapped into the wiring ect?How long have you owned this rig and did the gauges quit while you have had it. Reason I ask Is I did some research on ecm interchangability a few months back and found that the issue you are having can come down to the wrong ecm on the engine. Different year ecms will install and the engine will always run but the primary issue with having a different year ecm is the gauges do not work as well as some other functions like cruise ect.Make sure all pins are pushed into the connectors as well grab every single wire and make sure it is snapped into the connector at both ends. This is a common issue. also it is good to get a replacement male pin to insert into every female recepticle, I deal with this on certain pieces of equipment on a regular basis. the female recepticles can stretch open and will create a non contact issue so by inserting a male pin into every single female socket /recepticle you can feel if it has a snug or loose fit.

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has anyone got the wiring specs for a 1998 dodge ram 1500? I'm hoping to install my security/start unit this week. It looks like the 97 and 99 versions are different so i'm not sure which colors to use.

to wire the locks? like i said i can't find that stupid wire, i found it way up behind the instrument cluster, and was able to tap into that (i know it's cheating) but it would be a PITA to cut the wires and splice into both sides

The voltage signal from the multifunction switch to the BCM should be zero volts with the wiper switch off. With a scan tool you will see an improper voltage signal (0.8-1.2 volts), replace the multifunction switch.

My post on the DodgeTalk forum got some great help - TSB and wiring diagram.

dodgetalk.com 1998 Dodge Caravan Electrical Problem - Phantom Ghost Wipers - DodgeTalk : Dodge...DodgeTalk : Dodge Car Forums, Dodge Truck Forums and Ram Forums

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