Where is Ground Connection"B" ? |
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Where is Ground Connection"B" ? |
kenshapiro2002 |
Sep 23 2009, 12:21 PM
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#1
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Senior Member Group: Members Posts: 1,443 Joined: 23-July 09 From: Bawlmer, MD Member No.: 10,598 Region Association: MidAtlantic Region |
Where is the ground numbered #83 (Ground connection "B") on a 1970 914? It's not the one in the rear trunk, and not the one by each headlight. It's the one that grounds all the dash switches, door switches, fan and heater switch, etc.
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FourBlades |
Sep 25 2009, 08:05 AM
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#2
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From Wreck to Rockin Group: Members Posts: 2,056 Joined: 3-December 07 From: Brevard, FL Member No.: 8,414 Region Association: South East States |
I'd say buy a new relay or try one known to be good from a friend's car. That will either solve the problem or eliminate the relay as a possibility. You could also try tracing all the wires involved and look for shorts, cracks in the insulation, bad connections, etc. You could also try taking out all the fuses except #9 and see if the problem still exists. If it still exists, the problem is in this circuit. If the problem goes away, try adding fuses back one by one. When it comes back, then there must be some interconnection in the circuits that is causing the problem. Having hard information like this is very helpful in finding the problem. I am no expert on 914 wiring, and this advice may not help, but I know from engineering that you need to isolate the problem, and definitively rule things out one by one. Often times the hardest bugs to track down were ones that people thought "for sure" they had ruled out. Usually it turned out that they "assumed" that something was good instead of "testing" it for sure. This caused them to look at every other possibility except the one they "assumed" was ok. I need to debug my blue car here soon and I am sure I will have similar issues. Good luck. John |
kenshapiro2002 |
Sep 25 2009, 09:18 AM
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#3
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Senior Member Group: Members Posts: 1,443 Joined: 23-July 09 From: Bawlmer, MD Member No.: 10,598 Region Association: MidAtlantic Region |
Took out all the fuses except #9. Everythiing was fine, so I started adding them back. The final result was that if I have all the fuses in except #8 and #11, all is quiet. When I add #11 or #8 all hell breaks loose again.
I'd say buy a new relay or try one known to be good from a friend's car. That will either solve the problem or eliminate the relay as a possibility. You could also try tracing all the wires involved and look for shorts, cracks in the insulation, bad connections, etc. You could also try taking out all the fuses except #9 and see if the problem still exists. If it still exists, the problem is in this circuit. If the problem goes away, try adding fuses back one by one. When it comes back, then there must be some interconnection in the circuits that is causing the problem. Having hard information like this is very helpful in finding the problem. I am no expert on 914 wiring, and this advice may not help, but I know from engineering that you need to isolate the problem, and definitively rule things out one by one. Often times the hardest bugs to track down were ones that people thought "for sure" they had ruled out. Usually it turned out that they "assumed" that something was good instead of "testing" it for sure. This caused them to look at every other possibility except the one they "assumed" was ok. I need to debug my blue car here soon and I am sure I will have similar issues. Good luck. John |
Spoke |
Sep 25 2009, 09:58 AM
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#4
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Jerry Group: Members Posts: 7,052 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
Took out all the fuses except #9. Everythiing was fine, so I started adding them back. The final result was that if I have all the fuses in except #8 and #11, all is quiet. When I add #11 or #8 all hell breaks loose again. OK, just to clarify, you still have pins 49a and K disconnected? Keep them disconnected if you have found the issue still happens with them disconnected. More clarification: When you added #11 with #8 removed, you also turned on the 4-way flasher? With #11 in with #8 removed, is there a difference with 4-ways on and off? |
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