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Old 04-06-2014, 01:27 PM   #1
dman1982
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A dumb question...ish

So we hooked up the harness last night and wasn't able to get her to turn over from the key, we did get it to crank by jumping it, so good news is it's not locked up, bad news is no crank from the key...so the dumb question is does the grounds on the back of the engine have to be hooked up just to crank it?
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Old 04-06-2014, 02:46 PM   #2
truckdude239
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Re: A dumb question...ish

are you using your orginal starter crank signal wire?
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1971 Chevy c-10 under going a 4.8l LSx swap

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Old 04-06-2014, 02:47 PM   #3
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Re: A dumb question...ish

No, I'm using the one from the 2004 motor
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Old 04-06-2014, 02:48 PM   #4
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Re: A dumb question...ish

You talking about the one that goes from the battery to the starter right?
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Old 04-06-2014, 03:01 PM   #5
truckdude239
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Re: A dumb question...ish

no there should be a small wire with a ring terminal on it from the original harness on the truck it goes to the small post on the starter
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1971 Chevy c-10 under going a 4.8l LSx swap

Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305

2007 Honda Accord my daily 145kmiles
2002 Honda Accord 4 door With 330k(sisters car)
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2002 Sububran 5.3 245k
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Old 04-06-2014, 03:02 PM   #6
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Re: A dumb question...ish

Oh, ya I put that on
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Old 04-06-2014, 03:47 PM   #7
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Re: A dumb question...ish

there should also be a wire at the either the battery of an extra wire that bolts to the big lug on the stater that feeds power to the stock harness
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1971 Chevy c-10 under going a 4.8l LSx swap

Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305

2007 Honda Accord my daily 145kmiles
2002 Honda Accord 4 door With 330k(sisters car)
2005 toyota Avalon 228k( brothers car)
2002 Sububran 5.3 245k
2000 Tahoe 5.3l 378

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Old 04-06-2014, 03:49 PM   #8
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Re: A dumb question...ish

Quote:
Originally Posted by truckdude239 View Post
there should also be a wire at the either the battery of an extra wire that bolts to the big lug on the stater that feeds power to the stock harness
Ah...to 12 volt constant on the harness?
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Old 04-06-2014, 04:28 PM   #9
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Re: A dumb question...ish

Use the purple wire that comes out of the bulkhead on the engine compartment side of the fuse box, that originally went to the old 350 starter. Dont use any part of the LS harness.
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Old 04-06-2014, 04:33 PM   #10
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Re: A dumb question...ish

gotcha...i really appreciate that....havin trouble getting the fuel pump to purge as well
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Old 04-06-2014, 06:05 PM   #11
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Re: A dumb question...ish

now on my harness i have a purple wire that says starter, and then i have a purple one that comes out of the bulkhead...both goto starter? and will they go on the little post or the big post of the starter?
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Old 04-06-2014, 06:06 PM   #12
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Re: A dumb question...ish

Do you mean it won't come on at all? Who did your harness? There should be a wire that needs constant 12v and some that need 12v switched, these should be hooked to an ignition relay that gets powered up by the wire that originally went to the HEI.
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Old 04-06-2014, 06:07 PM   #13
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Re: A dumb question...ish

a guy from close by did my harness...im going to take a picture of what I'm talking about
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Old 04-06-2014, 06:10 PM   #14
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Re: A dumb question...ish

That purple wire there says starter, next to it is the purple wire from the bulkhead
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Old 04-06-2014, 06:15 PM   #15
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Re: A dumb question...ish

So the purple wire in the LS harness you connected to the one from the bulkhead and it didn't start? Did you connect the other side of the purple wire in the LS Harness to the starter?
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Old 04-06-2014, 06:15 PM   #16
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Re: A dumb question...ish

i didn't see another end of the purple wire to the starter...
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Old 04-06-2014, 06:19 PM   #17
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Re: A dumb question...ish

Quote:
Originally Posted by dman1982 View Post
i didn't see another end of the purple wire to the starter...
Well it has to be there and hooked up to the starter. Otherwise, just run a wire from the bulkhead wire straight to the starter.
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Old 04-06-2014, 06:22 PM   #18
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Re: A dumb question...ish

Purple to purple got it cranking
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Old 04-06-2014, 06:29 PM   #19
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Re: A dumb question...ish

Sugar, water, purple; you were just missing the purple

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Old 04-06-2014, 06:29 PM   #20
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Re: A dumb question...ish

the pink wire from my relays thats for 12 volt ignition on goes to what wire on the bulk head? ya I'm a wiring dumb azz lol
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Old 04-06-2014, 06:29 PM   #21
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Re: A dumb question...ish

Quote:
Originally Posted by BR3W CITY View Post
Sugar, water, purple; you were just missing the purple

freakin hilarious
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Old 04-06-2014, 06:34 PM   #22
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Re: A dumb question...ish

Quote:
Originally Posted by dman1982 View Post
the pink wire from my relays thats for 12 volt ignition on goes to what wire on the bulk head? ya I'm a wiring dumb azz lol
Should be a heavy gauge either pink or red wire that originally went to the HEI.
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Old 04-06-2014, 06:39 PM   #23
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Re: A dumb question...ish

theres a couple pink and red bigger wires
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84 K10
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Old 04-06-2014, 06:55 PM   #24
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Re: A dumb question...ish

and i should be able to hear the fuel pump prime up right? i got a walbro in tank pump
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84 K10
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My LS Swap http://67-72chevytrucks.com/vboard/s...=1#post6559371
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Old 04-06-2014, 08:52 PM   #25
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Re: A dumb question...ish

had a grounding issue with the fuel pump, and had the wires hooked up backwards....working now...kinda...which wire is the ignition on?
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84 K10
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2011 nissan altima
2009 Troy Built with a 42 Inch Deck

My LS Swap http://67-72chevytrucks.com/vboard/s...=1#post6559371
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