shaunbolton

I want to hook a scan tool up to my 1991 w250 to check some of my sensors. But I'm not sure where to hook it up. Help would be great. Thanks.

BigWhiteTruck

I was told by the dealer when I had my 91 the it was not compatible with a scan tool.

440_D50

I don't believe they have a scan tool port. There's really no computer to tell you codes anyway as far as I know. I dont think the ECM under the hood stores codes

Riflemanusmc

Mans right.. No OBD port.

sdseva

i was wondering about this on my 92. is it possible for mine? if so where?
thanks

Crossy's son

Theres a plug on the left inner fender that will tell you some stuff, only on 92-93's though...

dstad

you can cycle the ignition then count how many times the oil light flashes and figure out codes that way

sdseva

how is this done? is this blasphemy? are you yanking my chain? please explain
thanks much

simplysmn

Cycle the key 3 times and it will show you the codes on the speedo area

wannadiesel

If it's an intercooled truck, it can be connected to a scanner. The port is where Brandon said.

Close, but it's the check engine light (AKA MIL).

Got the number of cycles right (on, off, on, off, then leave on) but the codes are flashed on the MIL. Late model Chrysler products do work as you say - which is pretty cool and very convenient.

sdseva

how do you know what means what? my check engine light is on. if i cycle the ignition like you said what should i look out for? im going to try this now. thanks again.

dstad

I believe there is a link in the sticky about this. But im not for certain

shaunbolton

Thanks I found the plug near the inner fender. It's a big help when your able to hook up the scanner. Thanks again.

simplysmn

When you cycle the key count how many times it blink's and it will give you codes

sdseva

sweet it works! what a sneaky trick. does it give 6 digit codes? if so mine is 124154 anybody know what that means or where i can find out? i hope its not to bad