 after jwest fuse box install fuel pump doesn't work |
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| ringerdc |
 Jul 29 2015, 01:19 PM
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#1
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Newbie  Group: Members Posts: 11 Joined: 28-January 13 From: Calistoga, Northern California Member No.: 15,443 Region Association: Northern California  |
I have a '73 914 with a SBC conversion. Installed a jwest fuse box and now my fuel pump does't work. No longer getting power when ignition is in the on position. Thought it would be ease to diagnose but no luck so far. Any help would be appreciated.
Don |
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| screenguy914 |
Jul 29 2015, 02:05 PM
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#2
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Member Group: Members Posts: 249 Joined: 6-July 09 From: So. Cal Member No.: 10,540 Region Association: Southern California |
QUOTE(ringerdc @ Jul 29 2015, 12:19 PM)  I have a '73 914 with a SBC conversion. Installed a jwest fuse box and now my fuel pump does't work. No longer getting power when ignition is in the on position. Thought it would be ease to diagnose but no luck so far. Any help would be appreciated. Don How is a JWest fuse box connected to the system? Schematic available? Until further diagnosis, could be: open circuit no connection fuel pump malfunction no gas malfunctioning ign. switch blown fuse relay malfunction Sherwood |
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| whitetwinturbo |
Jul 29 2015, 02:07 PM
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#3
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Honey, does this wing make my ass look fat? Group: Members Posts: 1,391 Joined: 22-October 11 From: Newport Beach/Kalefornya/USA Member No.: 13,704 Region Association: Southern California |
QUOTE(ringerdc @ Jul 29 2015, 12:19 PM) I have a '73 914 with a SBC conversion. Installed a jwest fuse box and now my fuel pump does't work. No longer getting power when ignition is in the on position. Thought it would be ease to diagnose but no luck so far. Any help would be appreciated. Don Was the key powering the fuel pump BEFORE you installed Jwest box? Is fuse to that connection blown & is battery dead [signed Captain Obvious (IMG:style_emoticons/default/bye1.gif) ]? Let's see some pictures too ........ [I have 73 SBC conversion build going (slowly) since it sat for 5++years without moving so I'm sorting out PO work---key does currently fire off my fuel pump] |
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| Tom |
Jul 29 2015, 02:08 PM
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#4
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Advanced Member Group: Members Posts: 2,139 Joined: 21-August 05 From: Port Orchard, WA 98367 Member No.: 4,626 Region Association: None |
If your fuel pump was working OK and you changed out the fuse box and now the fuel pump no longer works, the installer wired something wrong. The fuse block just provides power to the fuel pump circuit, it doesn't control when the fuel pump runs. Have the installer go back over their work. If it worked before, it should work now.
I would walk thru the fuel pump power for you, but with a conversion the fuel pump can be wired several different ways. Tom |
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| ringerdc |
Jul 29 2015, 03:23 PM
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#5
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Newbie Group: Members Posts: 11 Joined: 28-January 13 From: Calistoga, Northern California Member No.: 15,443 Region Association: Northern California |
pump worked (off ignition switch) prior to updating fuse box.
engine compartment relay panel deleted and renegade wiring harness installed. since renegade harness plugs into factory connection I assume that the fuel pump circuit is the same? I think Tom is probably correct. Since the only change was the box I likely installed the new fuse box incorrectly and crossed some wires. P.S. gas in tank no blown fuses all relays good battery charged Just no juice to pump. I was hoping to avoid having to trace the circuit all the way back to the source. Thanks for the input |
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| Jeffs9146 |
Jul 29 2015, 03:54 PM
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#6
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Ski Bum Group: Members Posts: 4,062 Joined: 10-January 03 From: Discovery Bay, Ca Member No.: 128 |
The factory fuse box had jumpers that would power up other circuits when the key was turned on. You have to add those jumpers to the JWest box.
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| whitetwinturbo |
Jul 29 2015, 04:56 PM
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#7
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Honey, does this wing make my ass look fat? Group: Members Posts: 1,391 Joined: 22-October 11 From: Newport Beach/Kalefornya/USA Member No.: 13,704 Region Association: Southern California |
Is "key on" firing up everything else besides pump? If no, a statistically interesting ignition switch failure could have occurred.
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| ringerdc |
Jul 29 2015, 10:32 PM
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#8
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Newbie Group: Members Posts: 11 Joined: 28-January 13 From: Calistoga, Northern California Member No.: 15,443 Region Association: Northern California |
Anyone have a color coded schematic of the fuse box wiring? The diagrams in the manuals are pretty small and complex for us wiring impaired types.
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| falcor75 |
Jul 30 2015, 12:14 AM
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#9
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Senior Member Group: Members Posts: 1,579 Joined: 22-November 12 From: Sweden Member No.: 15,176 Region Association: Scandinavia 
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I swapped to a JWest fusebox in march and I took a bunch of pictures before I did it for reference. Will try to get those posted up and hopefully they will help you.
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| falcor75 |
Jul 30 2015, 12:27 AM
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#10
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Senior Member Group: Members Posts: 1,579 Joined: 22-November 12 From: Sweden Member No.: 15,176 Region Association: Scandinavia
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Ok, only posting links as the pictures quite big...
http://matsgarage.com/wp-content/uploads/2...09-18-21-06.jpg http://matsgarage.com/wp-content/uploads/2...09-19-45-44.jpg http://matsgarage.com/wp-content/uploads/2...09-19-45-53.jpg http://matsgarage.com/wp-content/uploads/2...09-19-46-01.jpg http://matsgarage.com/wp-content/uploads/2...10-09-49-13.jpg http://matsgarage.com/wp-content/uploads/2...10-09-51-05.jpg http://matsgarage.com/wp-content/uploads/2...10-09-51-09.jpg http://matsgarage.com/wp-content/uploads/2...10-09-51-12.jpg http://matsgarage.com/wp-content/uploads/2...10-10-02-06.jpg I added some heatshrink to some terminals to keep them insulated from eachother. http://matsgarage.com/wp-content/uploads/2...10-10-02-14.jpg |
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| ringerdc |
Jul 30 2015, 11:32 AM
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#11
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Newbie Group: Members Posts: 11 Joined: 28-January 13 From: Calistoga, Northern California Member No.: 15,443 Region Association: Northern California |
Thanks...should be very helpful
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