starter fuse??
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
" i hot wired the starter and the car started normally "
VATS takes out the fuel injectors as well as the starter so if it was a VATS problem engine would not start when starter hotwired
Problem is with starter circuit
Last edited by rodj; Oct 9, 2010 at 01:47 AM.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
But you are telling him to check the key pellet resistance and wiring which is not relevant in this case.
VATS module is seeing correct resistance and operating; otherwise engine would not fire and run when hot wired.
What he should be doing is bypassing the enable relay with a jumper after confirming he has 12V to relay with key in start position
Thread Starter
Racer
Joined: Feb 2009
Posts: 486
Likes: 3
From: el cajon ca
If your 91 is a manual transmission, the clutch safety switch has a two pin connector. This switch is at the top of the clutch pedal bracket. If automatic, the gear selector switch is at the base of the gear shift and it too has a two pin connector. Now go back and read my post again, it troubleshoots the VATS system which is likely why your vette won't crank.
Thread Starter
Racer
Joined: Feb 2009
Posts: 486
Likes: 3
From: el cajon ca
Correct.
But you are telling him to check the key pellet resistance and wiring which is not relevant in this case.
VATS module is seeing correct resistance and operating; otherwise engine would not fire and run when hot wired.
What he should be doing is bypassing the enable relay with a jumper after confirming he has 12V to relay with key in start position
But you are telling him to check the key pellet resistance and wiring which is not relevant in this case.
VATS module is seeing correct resistance and operating; otherwise engine would not fire and run when hot wired.
What he should be doing is bypassing the enable relay with a jumper after confirming he has 12V to relay with key in start position
Last edited by Ricky 91 vette; Oct 9, 2010 at 05:48 AM.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
But as JFB notes; the VATS module could be faulty on only the starter enable circuit .
If it turns out that is the case; you can permanently bypass the starter relay and VATS will still take out the injectors to prevent someone stealing your car
Last edited by rodj; Oct 9, 2010 at 07:46 AM.
Thread Starter
Racer
Joined: Feb 2009
Posts: 486
Likes: 3
From: el cajon ca
Finally it's running again!!!
Before you do , check there is 12V on the heavy yellow wire of relay plug when key in start or jumper the two yellows and see if engine will start. If it doesn't, you have no power coming from Ign switch and a new relay won't change anything
But as JFB notes; the VATS module could be faulty on only the starter enable circuit .
If it turns out that is the case; you can permanently bypass the starter relay and VATS will still take out the injectors to prevent someone stealing your car
But as JFB notes; the VATS module could be faulty on only the starter enable circuit .
If it turns out that is the case; you can permanently bypass the starter relay and VATS will still take out the injectors to prevent someone stealing your car
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
So now you know how to trouble shoot electrics 
Hotwire a item to make sure it is working correctly, then just follow power through the circuit until it disappears
That is why I recommend getting the FSM; it shows the exact path power takes
Hotwire a item to make sure it is working correctly, then just follow power through the circuit until it disappears
That is why I recommend getting the FSM; it shows the exact path power takes
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Thread Starter
Racer
Joined: Feb 2009
Posts: 486
Likes: 3
From: el cajon ca
yah, thanks alot, now i have better idea about that, thanks to u guys all,, i would buy the fsm but i'm kind of on budget right now.
