Hum. You've touched all the usual bases. Not sure of the BCMs function in the circuit based on my schematic but, pull the IOD fuse in the PDC (next to battery) for 2-3 minutes. This will reset the BCM and maybe your turn sigs.

Hows continuity from the L&R TS wires from the combo flasher socket to the MF switch connector? Parking lights work? How is 10A fuse #1? Was anything done under the dash prior to the turn sigs going out?

 

Thanks for responding. A little bit of history started with the w/wipers malfunctioning. I bought a multi switch from a local Dodge dealer, replaced with the same outcome. Not to much later I replaced the BCM and then the motor itself. I was continuously diag this problem when I would intermittently loose my turn signal functions. Well about 5 months ago my 3.8 spun a rod bearing. So since I had an alternate vehicle, I decided to pull and rebuild it completely. After many evenings an weekends I took it out this pass weekend on her maiden voyage.
Now about the L&R wires from the combo relay, I have a Haynes manual and the electrical diagrams does give wire colors but not pin #'s. I know it goes to the junction box but which connector. I checked #1 fuse, OK. Parking lights work and emergency flasher circuit works. Thats what baffels me. When I checked the connector to the M/F switch it was not connected and pin 1 did have +12v, I jumped it to pin 8 and the flashers worked but I had nothing on pins 2&3 which are for the L&R TS. On the 96 according to Haynes the #10a on the JB is #1 which is OK. OEM service manual or dealer?:headbange

 

Have you ruled out the ignition switch?

 

I don't have 96 prints but on my 00 prints the multifunction switch only provides grounds for the various functions. I show a fuse #12(10A) in the JB under the dash that I think is probably only for the normal turn signals. If you were to measure the 12v you saw at pin 1 at the rear of the connector with it plugged in, and then turned on the hazard flasher, the 12v will probably go away as the ground is switched in. As an educated guess, I think you were reading the 12v coming out of the combo flasher through an internal component.

 

take it to billman

 

too funny

 

billman is great with cars

 

or if your in jersey... take it to jeff

 

Working backwards. According to the Haynes Manual I have, there is a black wire from the switch to ground for the multi function switch (turn signals & hazard) Since your hazzards are working, it can be assumed that the ground is okay. Can you manualy make the signal lights work at that point by say grounding out the Lt Blu/Wht or Lt. Blu./Yell.. I think you have already done that and the answer is "no".
I understand you can can make the signal lights work by hooking into the wire for the hazard lights (Drk. Blu./Pnk.) Conclusion here is the circuits for both the Right and Left signal lights are open "somewhere" and that "somewhere" is common to both circuits.
I don't know that I would trust the Haynes Manual in this situation. The Partsman at your local dealership may make a copy of the wiring diagram for you. I have had this done for the power door locks on a 95 Caravan. Your local Library may have a Manufacturer's manual that they purchased or someone donated. You will be surprised at what they may have. Good luck.

 

On second thought, when you hooked into the flasher circuit, you were actually putting that circuit (flasher) into operation through the relays maybe?????? Did both sides flash at the same time when you did this?

 

I've posted this before, but I had a problem with the left turn signal not working ('98 T&C). The hazards were working. I discovered that if I moved the turn signal lever to the left signal position and it did not flash, that if I turned on the hazards (while the turn signal was still in the left postion) and then turned them back off that the left signal would now be flashing. This worked for a while and then the hazards quit working. I replaced the flasher unit (part number 4686094) and the signals have worked fine ever since (about two years now).

 

That makes sense gdcoxjr. Unit was working but defective and current was going to the wrong places.
The turn signal switch has a "ground" associated with it. So do the signal lights. So in between there must be a relay. Perhaps that's the flasher.

 

I think the flasher for these vehicles is a relay. It does not look like the old round silver flashers, but is a rectangular shape and costs almost $50 from the dealer!

 

Similar Problem No Turn Signals, No 4 Ways, 98 Sport

I need some genius help. Here's my problem. 98 Sport, In December I changed the oil and the next morning my battery was dead. (Yeah, how does changing the oil/filter kill the battery? I don't know either!) Charged the battery and upon driving the van, discovered the turn signals nor the 4 way flashers were working. When I would turn on the 4 way flashers, I would get a faint whimper out of the relay so I figured it was the relay and headed on to my brother's thinking I'd pick up a relay on the way. Of course I discovered a common flasher relay wouldn't work and I needed to be 700 miles away the next morning. Since all the other lights (brake, backup, headlamps, parking lights) were working, I made the trip using hand signals and prayer.

Since then, I have switched out the relay and multifunction switch with known good ones. Neither item has worked. Do you think the Body Control Module may be the problem? It's expensive and a pain to remove. I have a 97 Grand Caravan I can use to swap modules to see, but then I'm removing and replacing two modules for twice the time and effort.

I'm getting desparate and frankly I don't have the money to spend on excess parts or fruitless troubleshooting by a stealership.

Any ideas folks. Thank you very much in advance

 

Might check to see if the combo flasher module (your new relay) is getting power. First make sure fuse #10 in the PDC (fuse box next to battery) and fuse #12 on the Junction Block (lower left dash) are good. Both are 10 amp fuses. Good? Next grab a meter or test light, remove the flasher module and check for 12 vdc at contact #6 on the socket. Good? Now turn the ignition switch to run and check for power at contact #1. Good?

You could try a BCM but, I'd have some doubt if it would help. The schematic shows it in the circuit but, it appears all it does is supply a ground to the parking lamp relay, supply power to all external lights (except headlights) and power to the turn sig indicators on the dash. The only direct connection appears to be a jumper from the flasher module to allow the dash turn sig indicators to flash. Logic tells me the flasher unit makes the lights flas, not the BCM but, I'm no genius.

On second thought, you may not want to use the BCM from the 97 if it has a security system. Don't remember details but it could screw up the PCM. Something to do with security systems mismatch. Read it on another forum a while back. I'll see if I can find the post.