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03-22-2022, 05:53 PM
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#1 |
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Registered User
Join Date: Mar 2011
Location: madison, NC
Posts: 81
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four fuses and two relays. need help.
Hey all, i haven't posted in a long time. my 4 fuse block has full power without key on. i dont think this is right. when i turn (to the on position) the key nothing happens. i used lt1 swap for the fuses and relays. even the fuel pump runs for 2-3 seconds when i connect the battery ground.
2002 5.3 DBW |
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03-22-2022, 06:57 PM
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#2 |
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Registered User
Join Date: Mar 2011
Location: madison, NC
Posts: 81
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Re: four fuses and two relays. need help.
this is a 1953 ad, s10 swap. s10 wiring from cab.
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03-23-2022, 06:36 AM
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#3 |
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Senior Member
 
Join Date: Aug 2018
Location: London, Ky
Posts: 1,163
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Re: four fuses and two relays. need help.
It sounds like you have battery power to the ignition wire that goes to the ignition relay.
__________________
Carl 1971 GMC short bed, (Henry) Options I've added, tilt, ac, 8k tach, Electric speedometer conversion for LS swap, 6.0 with 823 heads and BTR stage 4 truck cam, 4L80e, posi with 3.73 rear end, Power steering and power brakes Lowered 5/7. Frame up build. |
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03-26-2022, 08:11 PM
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#4 |
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Registered User
Join Date: Mar 2011
Location: madison, NC
Posts: 81
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Re: four fuses and two relays. need help.
ok it's still not right. i removed the constant wire going to the cab. put a constant wire to feed harness only. still have the same problem. dose this mean i have wire something wrong in the harness?
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03-27-2022, 11:04 AM
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#5 |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
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Re: four fuses and two relays. need help.
Yes, you have something wired wrong. There should be a constant hot and an ignition (key on) hot to the ignition relay. It sounds like that isn't hooked up right. What wire are you using to power up the relay?
__________________
My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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03-28-2022, 12:00 AM
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#6 |
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Senior Member
Join Date: Dec 1999
Location: Southern California
Posts: 2,884
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Re: four fuses and two relays. need help.
Ditto to the two previous posts. Check to see if you hear the relays click when you connect battery ground. Constant +12v should go to common terminal on relays. Switched +12v power should be going to the coil on relay. The wire on the coil of relay should not have power when ignition is off.
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Richard 1972 K10 Custom Deluxe SWB Fleetside My build https://67-72chevytrucks.com/vboard/...d.php?t=800746 |
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03-28-2022, 04:28 PM
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#7 |
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Registered User
Join Date: Mar 2011
Location: madison, NC
Posts: 81
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Re: four fuses and two relays. need help.
i have a constant hot from the battery to power relay and PCM. keyed pink wire hot in start and run for relay. without turning the key all fuses have power. yes i hear the relays and fuel pump for around 2-3 seconds. I followed ucandoit site to wire relays and changed it to lt1 swap with the same result.
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03-28-2022, 04:45 PM
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#8 |
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Registered User
Join Date: Mar 2011
Location: madison, NC
Posts: 81
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Re: four fuses and two relays. need help.
pink wire is only hot with key on.
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03-29-2022, 06:26 PM
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#9 |
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Registered User
Join Date: Mar 2011
Location: madison, NC
Posts: 81
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Re: four fuses and two relays. need help.
ok, with constant hot wire i am getting power to the fuses thru what is suppose to be injector wires.
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03-29-2022, 10:18 PM
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#10 |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
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Re: four fuses and two relays. need help.
If you have constant power on the injector wires, then you're probably back-feeding power to the whole harness. You don't have something wired right. Have you pulled the relay to see if the constant power goes away?
__________________
My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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04-19-2022, 04:16 PM
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#11 |
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low n' slo
Join Date: Mar 2009
Location: rosenberg, texas
Posts: 5,175
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Re: four fuses and two relays. need help.
quick question. you only used lt1swap for their diagram, or were they the ones that actually rewired it for you?
__________________
67 1/2 ton Suburban - Project DRGNWGN. Build thread  -_--_--_ _________ _--_-_ -/____|__|__\__ ,.,,,.,.,,.,|_O _______ O_] |
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04-20-2022, 11:13 PM
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#12 |
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Blue 67
Join Date: Apr 2004
Location: Western WA
Posts: 1,179
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Re: four fuses and two relays. need help.
I am glad you found the problem.
Based on what you have explained, I thought you wiring to the main relay (relay's posts) may have been mixed up. You may want to check on that if you have not already. Good luck.
__________________
1953 GMC 3/4 ton: current project 1967 C20: 5.3 voretc with T5 conversion, 4 wheel 8 lug disc brake 1972 Nova: my 4 door sport sedan! 5.3 voretc + T5 conversion. drivable project, FUN!! 1979 Camaro Z28: 5.3 vortec conversion with build TH350: drivable project, Fun to drive 1992 Camaro RS convertible (Z28 clone): 5.3 conversion with build T5: on going project 2005 Silverado 2500, 4x4 Duramax, original owner |
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04-21-2022, 08:49 AM
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#13 |
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Registered User
Join Date: Mar 2011
Location: madison, NC
Posts: 81
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Re: four fuses and two relays. need help.
I used lt1swap diagram . He did my computer.
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04-22-2022, 08:43 AM
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#14 | |
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low n' slo
Join Date: Mar 2009
Location: rosenberg, texas
Posts: 5,175
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Re: four fuses and two relays. need help.
Quote:
__________________
67 1/2 ton Suburban - Project DRGNWGN. Build thread -_--_--_ _________ _--_-_ -/____|__|__\__ ,.,,,.,.,,.,|_O _______ O_] |
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