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no power to fuel pumps / wire harness / fuse and relay block

 
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bgammie1  



Joined: 20 Mar 2011
Posts: 100
Location: Snellville, GA

PostPosted: Sat Nov 05, 2016 6:53 am    Post subject: no power to fuel pumps / wire harness / fuse and relay block Reply with quote

I have lost power to my fuel pumps and a little smoke came out of the area or the wire harness while I was feeling around trying to find something obvious that may have been the cause.
Losing power to the fuel pumps was an occasional issue that I used to be able to solve by putting my left foot up in the area of the wire harness and pushing the bundle of wires around, well that doesn't work anymore.
Has anyone else ever experienced this problem? What do you have to do to fix it?
For now I have disconnected the ground at the battery.
Any suggestions as to where to start would be appreciated.
Car has been running great until this happened.
Thanks,
Bruce
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BFG
1982 Porsche 924 NA
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Paul  



Joined: 02 Nov 2002
Posts: 9491
Location: Southeast Wisconsin

PostPosted: Sat Nov 05, 2016 12:35 pm    Post subject: Reply with quote

Drop the fuse boxes and check all connections and wires.
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Silver 98 986 3.6l 320 HP "Frank N Stein"
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Ian89C4  



Joined: 01 Apr 2011
Posts: 561
Location: North Carolina

PostPosted: Sat Nov 05, 2016 11:35 pm    Post subject: Reply with quote

There should be 3 or 4 large red power wires going into the back of the board , check those guys. It's been minute since I dug around in a harness, but I think one of them supplies power to what you are having issues with.

Those wires originate at the positive connection for the battery and pull power directly from the alternator charge line to the battery.

I would also check all grounds (two big bundles of them behind the fuze panel).

Good luck!

Ian
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Ian Edgerly
North Carolina

Current:
1981 924 SCCA/ChampCar Weissach Race Car ("Serenity")
1987 924S ChampCar Endurance Car ("Der Weg")
1980 924 Euro ("Wahala")
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bgammie1  



Joined: 20 Mar 2011
Posts: 100
Location: Snellville, GA

PostPosted: Sun Nov 06, 2016 6:32 am    Post subject: Reply with quote

does it make sense to remove the dash
having a very difficult time getting "up in there"
one bolt in front was easy to get to but it hasn't given enough freedom of movement to get the fuse/relay block to drop down
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1982 Porsche 924 NA
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Fasteddie313  



Joined: 29 Sep 2013
Posts: 2595
Location: MI

PostPosted: Sun Nov 06, 2016 10:42 am    Post subject: Reply with quote

bgammie1 wrote:
does it make sense to remove the dash
having a very difficult time getting "up in there"
one bolt in front was easy to get to but it hasn't given enough freedom of movement to get the fuse/relay block to drop down


Yeah it's pretty easy to take off.. First the trim on the windshield columns and the steering wheel, center column, and a few more screws n bam done..

Clean all sorts of grounds and contacts and rebuild switches and tape up heater lines so they seal, clean the heater controls mechanism while your in there etc..
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