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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Spoke |
Sep 25 2009, 08:11 AM
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#2
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Jerry Group: Members Posts: 7,052 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
The resistances of the relay look good. I don't think the relay is at fault.
Sorry for asking for all the measurements. Troubleshooting from afar is pretty difficult. We're trying to isolate the issue. There is (usually) one thing wrong but it's hard to find. Experiments and measurements will help isolate the issue. In previous tests, what was the resistance of the ground wire (brown) to chassis that you measured before? Have you tried this test: remove the 49a wire from the flasher relay and turn the power on. This should remove all loads from the flasher and it should not chatter. This will also confirm your 12V power and ground connection. No lights will flash, but then again we're just trying to isolate the issue. I have another test in mind but it's really radical. I'll dump this one on you later if the issue still exists. |
kenshapiro2002 |
Sep 25 2009, 08:59 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 |
Ground wire (31) has always shown zero.
Just eliminated 49A and the problem still exists. No lights flashed but the other power sources still got the relay to chattering. The resistances of the relay look good. I don't think the relay is at fault. Sorry for asking for all the measurements. Troubleshooting from afar is pretty difficult. We're trying to isolate the issue. There is (usually) one thing wrong but it's hard to find. Experiments and measurements will help isolate the issue. In previous tests, what was the resistance of the ground wire (brown) to chassis that you measured before? Have you tried this test: remove the 49a wire from the flasher relay and turn the power on. This should remove all loads from the flasher and it should not chatter. This will also confirm your 12V power and ground connection. No lights will flash, but then again we're just trying to isolate the issue. I have another test in mind but it's really radical. I'll dump this one on you later if the issue still exists. |
Spoke |
Sep 25 2009, 09:11 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 |
Ground wire (31) has always shown zero. Just eliminated 49A and the problem still exists. No lights flashed but the other power sources still got the relay to chattering. OK. This is good news. This eliminates any of the loads (master cylinder switch, ebrake switch, etc.) from causing the problem. We're narrowing down the possible issues. With 49a removed, you are just connected to power (49), ground (31), and the indicator lamps (K). Try to remove K at the same time 49a is removed. This leaves just power (49) and ground (31) connected. If the chatter continues with K and 49a removed, then just power and ground are connected. |
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