no power to the computer?
Thread Starter
Heel & Toe
Joined: Nov 2007
Posts: 18
Likes: 0
no power to the computer?
Checked some more stuff on the car, and found that it is not giving power to the D section of the computer. Does anyone know where the fusable link to that might be? (to the computer)
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
Fusible links are only used on high current circuits, none are used on the ECM. There is a fuse in the fuse block that powers the ECM. On my 87 it is called ECM/ign. I don't know what it is for 91's.
Team Owner
Joined: Aug 2005
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From: Riverside County Southern California
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I dont know about 91 but my former 92 Vert had some fuses underneath the passenger side's glove compartment. It is a bi^ch to get there.
I hope you resolve this and if you do, dig deeper...why did the fuse go out?
I hope you resolve this and if you do, dig deeper...why did the fuse go out?
Thread Starter
Heel & Toe
Joined: Nov 2007
Posts: 18
Likes: 0
all the fuses are good. there is just no power to the ECM. ??? the problems that we are aware of: no check engine light upon turning key to on position (lightbulbs and such are in working condition), noid lights dont blink when checking injectors, and no power to fuel pump. thinking it might be a bad ground wire, or no power to ECM. no clue where to start!!! 
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
Your symptoms indicate either no power to the ECM, blown injector fuses, or a defective ECM. If you have the GM electrical diagnosis service manual, it shows what pins on the ECM connector get 12v and what pin/pins are grounded. You can unplug the ECM and use your ohmeter to test the ground pins, then turn on the ign sw and check for 12v. If the ECM is getting power and is grounded and the injector fuses are not blown (check with an ohmeter), then you likely have a defective ECM.
If there is no power, then you need to go back up the wiring diagram and find out where the 12v power disappears.
If there is no power, then you need to go back up the wiring diagram and find out where the 12v power disappears.
