Mystery Voltage Draw - ZR-1 Net Registry Forums

WVZR-1 · 07-24-2015

I've never needed to do a "parasitic draw" test on a '91 but I believe if I had a parasitic draw on a '91 I'd start with doing a complete test of the DAB (Delayed Accessory Bus) first likely. A first year feature?

Determine how you want to do the parasitic draw test and be very systematic with your procedure. I've always used the - post and cable BUT ...

I've a friend who whenever doing a parasitic draw test didn't go to the fuse box but to the fusible links first. On a '91 aside from the ECM FL and the AC BCM FL all fusible links are at the junction block behind the battery. I might remove the fender panel and do it from there in an attempt to isolate the circuit.

I believe it would eliminate the need to remove the right side knee bolster to check the AUX BOXES where there's a pair of fuses for the convenience lighting and also the accessory leads in the console (another first year feature).

**** You do need to do a "load test" on the battery and confirm the condition FIRST!

07-24-2015	#11
WVZR-1 Join Date: Oct 2004 Posts: 1,890	Re: Mystery Voltage Draw I've never needed to do a "parasitic draw" test on a '91 but I believe if I had a parasitic draw on a '91 I'd start with doing a complete test of the DAB (Delayed Accessory Bus) first likely. A first year feature? Determine how you want to do the parasitic draw test and be very systematic with your procedure. I've always used the - post and cable BUT ... I've a friend who whenever doing a parasitic draw test didn't go to the fuse box but to the fusible links first. On a '91 aside from the ECM FL and the AC BCM FL all fusible links are at the junction block behind the battery. I might remove the fender panel and do it from there in an attempt to isolate the circuit. I believe it would eliminate the need to remove the right side knee bolster to check the AUX BOXES where there's a pair of fuses for the convenience lighting and also the accessory leads in the console (another first year feature). **** You do need to do a "load test" on the battery and confirm the condition FIRST!