Can someone tell me which connector i have to ground to set base timing?
i found a thread that said a yellow with red wire

my harness has two connectors
one is a black wire with white stripe (closest to the battery)
the other is a white wire with black stripe (closest to center of the car)
its been a while that i worked on the car so cant remember which is what?

see pics

car is a 1G 1990 gst

thnx

the (white/black) wire should be for engine speed adjustment

the (black/white) wire is for the fuel pump check

should be a (yellow/black) wire for the ignition timing adjustment

oke thnx for the info
so from the pics the fuelpump check and the ignition timing are next to each other?
gonna check under the hood again

thnx

Is it this one ? But mine is not black yellow ,

Ignition Timing Adjustment Connector

It’s a yellow with red stripe wire. But yes, that appears to be the right connector.