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mark houghton mark houghton is offline
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Join Date: Jul 2008
Location: Central Washington State
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Originally Posted by JFairman View Post
Hi Mark, I said I was jumping 87a and 30 but I was looking at the pin number diagram on the side of the yellow relay wrong. I'm actually jumping 87a and 86.

Hard to say which ones are correct because on the inside there is a ribbon connector between the main circut board and the mounting pin circut board and that makes it hard to trace what each pin is going to.

Anyway, when I jump pins 87a and 86 my overboost sensor still works as it should. If I pull the white wire off it the motor shuts off, put it back on or ground it and the motor will run and the yellow relay is no where near the car... only 87a and 86 pins are jumped.

So.. there's still some question about that yellow relay.
I'm thinking it does 2 or maybe 3 things.. like the short fuel pump burst when first turning the key to start the car that some people have noticed.
It probably works with the airflow sensor plate safety switch because I remember hearing a click from it when moving the sensor plate or removing/replacing the green plug and maybe it has something to do with the overboost sensor but mine works normally with only those 2 pins jumped.

for now I'll just enjoy the mystery... nothing new with this car and most women.
Yep, I'm with you on the mystery. One of these days I'll have to 'attempt' to follow the wiring schematics again. Seems to me that my 87/87A combination came about by trial and error. Hell, maybe I'm not looking at the relay correctly myself and am actually going between 87A and 86.
Sometimes I would rather screw with the flesh and blood equivalent of a 930, myself.
Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification.
Old 06-10-2010, 06:46 PM
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