1991.5 mopar

Can someone tell me if the plugs are the same or if it's possible to make a 2wd engine harness work on a 4x4?

Ikes91

As far as I know, the VSS plugs are the same, as D's and W's share the same VSS, just driven differently. The D harness can be used on a W, it just won't have the transfer case indicator circuit. I'll have to check the schematics in my FSM to be 100% sure...

1991.5 mopar

I know the overdrive switch in the cab is different too but I don't have to worry about that cause I have a 47rh. I'm not too concerned about the 4x4 indicator light. If you could let me know about the speedo being able to work with that harness I would appreciate it

cougar

The VSS is the same 91.5 to 93. The only difference in the wiring harnesses is the plug for the transfer case. The OD switches are the same. If the OD system worked on the A518, it will work on the 47RH. All you will need to do is add a manual switch or tie the lock up to the OD so they come on at the same time.

RamGuy84

I have run across 3 pin and 2 pin speedo connection's on 2 wheel drive truck's I believe it's the 93 that is 3 pin where 92 is 2 that is 2 and 4 wheel drive have 2 .

deere country

I have also had 3 pin speedo connectors on 2 wheel drive trucks. The overdrive switch is also different on the 91.5 trucks, looks the same on the outside but has a different connector for the wire harness than the 92 & 93.

cougar

According to the wiring diagrams, what I stated earlier is correct. If you have something different, someone changed it.

RamGuy84

Then there is ALot of different truck's because I have seen it several times on Stock truck's .

deere country

I just looked at my 91.5 auto and it also has the O/D switch that has a different connector than the 92 or 93 trucks. My 91.5 truck has 35,000 miles on it and I am certain it has never been touched before. I also have each year fsm manual except for the 93 model year but the 91.5 is not covered in 91 or 92 book. I beleive their are supplements for the 91.5 but I don't have them, they are essentially a blend of the 91 and 92 models in my opinion.

One thing about dodge is expect the unexpected. I have seen a lot of things used that were not correct for the model year but was used on an earlier version. I think if they had left over parts they were used up on the assembly line. So what is printed on paper isn't always 100% correct 100% of the time.

1991.5 mopar

I did hear about the o/d plug but I'm not too concerned because I have a 47rh that has its own switches

mknittle

Aint that the truth. I don't think any two are exactly alike

ofelas

Bingo.
Our ba$tard child 91.5s have some unusual differences from the rest of the herd ;-)