boostskillz

Hey everyone, I have an 87 951, and I have a HORRIBLE parasitic draw, measuring 12v, so basically huge. I've tried pulling all the fuses and relays to try to narrow down the possibilities, but have had no luck, so whatever the issue is, its on a non-fused/ relayed circuit. Does anyone have any ideas what could be the issue? Any common problem spots here?

mikeyoman

Where are you measuring the draw ? direct form the battery neg or pos ?
I'm guessing you mean 12 amps , not 12v as all the supply is 12v around the car !

do you have the manuals, with circuit diagrams ?
if not try ***.cannell.co.uk/Manuals.htm

Josh B

If you let the car sit how long before it won't start anymore?

carlege

This might help

http://cgi.ebay.com/ebaymotors/Elect...motiveQ5fTools

Bri Bro

Factory alarm module and aftermarket alarms, radios, amps etc.

boostskillz

Lol, yes amps, thats what I get for posting at 1am.

lee101315

12 amps? Woah, thats huge. If youre checking it correctly (disconnecting the negative lead of the battery and using the multimeter to bridge the contact), I would try disconnecting the alternator or starter. Dont be afraid to check relays either.

I never start tracing a short by pulling fuses, I would disconnect the wires attached to the +battery terminal one by one until the short disappears. That way, you can see what doesnt work or trace the culprit with a wiring diagram.

bearone

+ door switches, interior light, cigarette lighter, central locking.you're not pulling 12a but maybe 12ma/milliamps.

good procedure at clarksgarage for hi parasitic drag over 0.065/65ma.

Rock

Seriously the only cars I see with this problem are all 87 951's. It may just be a coincadence but damn.

Bri Bro

Coin cadence

The act of coins jumping out of your pocket and marching, in perfect cadence, into the hands of after market suppliers of 944 Porsche parts.

KuHL 951

Is that like a cowinkydink when both turn signals blink at once?

mikeyoman

Ok, 12 amps is a hell of a draw !

Pull all the relays and fuses, put them back one at a time, relays first, then consult the wiring diagrams (see previous link) to see what could be shorted. There won't be too many choices if you still draw 12 A with relays and fuses pulled, ignition off of course.

BTW: what have you just done that is new/different that may have caused this ?

Bri Bro

Don't get me wrong, my spelling ability is dependent on a spell checker.

boostskillz

Honestly, the car has been sitting for a while, but I realized today that the radio wasn't working, so i think its in that circuit, and upon pulling it out, found that whoever installed the headunit did a horrible hack-job of the wiring. I'm gonna fix this and see what I get.

boostskillz

Ok, still working on the radio issue, however, I wanted to ask about the rear hatch. I discovered today that the passenger side latch is broken, and therefore the hatch doesn't stay shut. Could this cause a draw issue?

P.S. Thanks for the link, MikeyOMan!