 Fuel pump for carbs on a '75, help |
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| mtndawg |
 May 15 2019, 10:16 PM
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#1
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Member  Group: Members Posts: 414 Joined: 26-January 09 From: Granite Bay, Ca Member No.: 9,985 Region Association: None 
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I have been following the directions in other posts to wire my car for carbs with a low pressure pump under the tank. In front I have a black/red wire and brown for ground which is expected. My number 13 pin on the 14 pin connector is green rather than black with red. I can't find a diagram of a '75 relay board and it's not in my manual. The previous owner had blue a jumper wire connected as shown in the photo. Is this arrangement right for this year when running carbs?
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| mtndawg |
May 17 2019, 08:09 AM
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#2
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Member Group: Members Posts: 414 Joined: 26-January 09 From: Granite Bay, Ca Member No.: 9,985 Region Association: None
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I have power on both sides of the fuse
Tested the relays and they all switch when power is applied Confirmed that the ‘75 has a green wire from pin 13 and changes to a black and red wire under the dash to connect to the fuel pump, this must be specific to ‘75 and ‘76 cars? Maybe I have a problem with 85 or 86 on the power supply relay which is not sending signal to the fuel pump relay switch? Attached thumbnail(s) 
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| Spoke |
May 17 2019, 08:18 PM
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#3
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Jerry Group: Members Posts: 7,126 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None
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QUOTE(mtndawg @ May 17 2019, 10:09 AM)  I have power on both sides of the fuse Tested the relays and they all switch when power is applied When you tested the relay, did you test in the car or separately? Pull the fuel pump relay and put a very small wire in the pin 87socket hole and replace the relay. Turn on the car and measure the voltage on the wire. |
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Posts in this topic
mtndawg Fuel pump for carbs on a '75 May 15 2019, 10:16 PM
Chi-town The blue jumper wire activates the fuel pump witho... May 16 2019, 05:21 AM Spoke It looks like pin 3 is connected to pin 4.
Pin 3 ... May 16 2019, 07:24 AM mtndawg Yes the PO had 3 and 4 connected. I’m not gettin... May 16 2019, 07:42 AM
Spoke
Yes the PO had 3 and 4 connected. I’m not getti... May 16 2019, 08:06 AM mtndawg I found a Bowlsby photo that shows the '75 wit... May 16 2019, 08:53 AM wndsnd Well it looks like fuel pump week. I wish I had s... May 17 2019, 09:01 PM mtndawg Had the relay board out testing everything I could... May 18 2019, 02:50 PM Spoke
Had the relay board out testing everything I coul... May 18 2019, 02:57 PM |
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