whats this wire for on a 1990 automatic?

[topless82vette]

it's a tan wire with single black stripe and has a black connector this wire is right by the wiper motor sort of.

for some reason there is a toggle switch connected to it so what is this wire for.

 

[tonylong]

Got no help but if my 89 has the same I'[d like to know too.

 

[mseven]

sounds like the EST, when disconnected allows for adjusting base timing at 6* (w/out computer control).

 

[G Winter]

sounds like the EST, when disconnected allows for adjusting base timing at 6* (w/out computer control).

I agree. Sounds like someone got tired of unhooking the wire to set the timing. Kind of a nice touch, I just may do that.
To check it ,if you have a timing light ,flip the switch and see if the timing drops to the specs.

Glenn

 

[topless82vette]

I agree. Sounds like someone got tired of unhooking the wire to set the timing. Kind of a nice touch, I just may do that.
To check it ,if you have a timing light ,flip the switch and see if the timing drops to the specs.

Glenn

Why would you want to do that since there is a easily accesible weatherpack connector like 3 inches from where he spliced this switches wires at.