[Kingfish999]

is it a 2 or 4-pin wire?

might be for the 4WABS front wheel speed sensor.

 

[Kingfish999]

the 94-96 have 4WABS. they use that round style plug

 

[Kingfish999]

what color are the wires to it?

the purge solenoid is by the throttle body on most trucks. late years (might be 96 only) where the MAP sensor would normally be. so its not that. not part of smog pump

like i said im pretty sure its for 4WABS wheel speed snesor

 

[Kingfish999]

Was the ABS speed Sensor available on 1989 model years? I’m asking because I know for a fact I disconnected that plug when I removed my engine, and I never plugged it back up because I didn’t have the corresponding harness anymore… the only electrical component I didn’t put back in was the purge valve as far as I can remember. And if this isn’t for the purge valve, where is the purge valve connector . I would like to hook the EVAP back up.

4WABS was only 94+ broncos. his being a 95 would had it
but the pic of his connector is round with a tab on the side just liek the 4wabs sensor. this diagram puts it right in that area also

as for your 89, heres view from a 90 and even that i would take with a grain of salt as it has alot of wrong stuff with the different diagrams. epecially that it has the 300 and 460 diagrams swapped

the C139 and C153 are borth for the alternator

 

[Kingfish999]

driver side Tan/Orange and Tan/Black
passanger side Yellow/Red and Yellow/ Black