Need some wiring help guys - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dubie · 03-10-2004, 05:03 PM

I hope you 73-87 experts can help me out

I have an 82 Chevy 350 engine in my 72. I haven't fired it yet because it still needs to be wired up. I used to have a 250 inline 6 , so the wiring is totally different. It's a bare bones engine with and HEI. Does anyone have an engine wiring diagram for this engine?

Russell · 03-10-2004, 05:08 PM

Any electric options on the engine? If not, its pretty much give 12 volts to the HEI, then 12 volts to the starter and she'll run

dubie · 03-10-2004, 05:11 PM

yeah but where does the power to the alternator come from? All my wiring is for a 72 inline 6. The alternator on the inline is on the drivers side and this one is on the passenger side. I have never done much engine wiring in the past.
Does anyone have a pic of their starter with all the wires connected that they could edit and show where the wires from the strater go to?

Russell · 03-10-2004, 05:13 PM

Hmm, not sure about the alternator... My truck is outside in the parking lot, nor will the teacher let me go outside, otherwise I'd go figure it out for you...

**Captkaos** · 03-10-2004, 05:51 PM

Power comes from the battery to the starter solenoid. Positive wire goes to a junction block (73-87) on the firewall and then goes into the fusebox. That is the switched power wire. Is this what you need?

bpmcgee · 03-10-2004, 06:07 PM

Alternators could be in either side -- mine is on the drivers side. It depends on if you have a short or a long water pump. And power doesn't go TO the alternator

Brian

dubie · 03-10-2004, 06:14 PM

yeah I got that part, but where does the power for the alternator come from?

bpmcgee · 03-10-2004, 07:02 PM

Quote:

Originally posted by dubie
where does the power for the alternator come from?

The crankshaft turns the alternator via the alternator belt.

I don't think I'm understanding your question.

I don't have a diagram here in front of me, but I'll look when I get home where the red wire on the alternator goes. I think that's what you're asking.

Brian

dubie · 03-10-2004, 07:09 PM

yeah, thats what I'm asking bud. Just need to know where that wire does to

*1FaastC10* · 03-10-2004, 07:18 PM

Quote:

Originally posted by bpmcgee
Alternators could be in either side -- mine is on the drivers side. It depends on if you have a short or a long water pump. And power doesn't go TO the alternator

Brian

yes, actually it does. it takes 12v for the alternator to start working. you can then remove the 12 volts once it has started charging, and it will continue to feed itself.

Bowed · 03-11-2004, 02:53 AM

The larger red wire on the alternator (post) goes to the + terminal on the battery , to charge the battery and the small red wire (connector) goes to the ignition switch Via the junction block , a thermistor or fuseable link required on that one and the brown wire (connector) goes to the voltage gauge

CORRECTION - Sorry, but I just found out from another thread that I am not completly right on what I posted above , It seems the brown wire goes to the ignition switch and the small red , "well " I don't know I have to find out my self .

03-10-2004, 05:03 PM	#1
dubie Registered User Join Date: May 2000 Location: Flin Flon, Manitoba, Canada Posts: 8,855	Need some wiring help guys I hope you 73-87 experts can help me out I have an 82 Chevy 350 engine in my 72. I haven't fired it yet because it still needs to be wired up. I used to have a 250 inline 6 , so the wiring is totally different. It's a bare bones engine with and HEI. Does anyone have an engine wiring diagram for this engine? __________________ My name's Tim and I'm a truckaholic My 56 Chevy shop truck build http://67-72chevytrucks.com/vboard/s...d.php?t=562795

03-10-2004, 05:08 PM	#2
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	Any electric options on the engine? If not, its pretty much give 12 volts to the HEI, then 12 volts to the starter and she'll run __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

03-10-2004, 05:11 PM	#3
dubie Registered User Join Date: May 2000 Location: Flin Flon, Manitoba, Canada Posts: 8,855	yeah but where does the power to the alternator come from? All my wiring is for a 72 inline 6. The alternator on the inline is on the drivers side and this one is on the passenger side. I have never done much engine wiring in the past. Does anyone have a pic of their starter with all the wires connected that they could edit and show where the wires from the strater go to? __________________ My name's Tim and I'm a truckaholic My 56 Chevy shop truck build http://67-72chevytrucks.com/vboard/s...d.php?t=562795

03-10-2004, 05:13 PM	#4
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	Hmm, not sure about the alternator... My truck is outside in the parking lot, nor will the teacher let me go outside, otherwise I'd go figure it out for you... __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

03-10-2004, 05:51 PM	#5
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	Power comes from the battery to the starter solenoid. Positive wire goes to a junction block (73-87) on the firewall and then goes into the fusebox. That is the switched power wire. Is this what you need? __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com

03-10-2004, 06:07 PM	#6
bpmcgee Registered User Join Date: Mar 2003 Location: Northern Illinois Posts: 2,181	Alternators could be in either side -- mine is on the drivers side. It depends on if you have a short or a long water pump. And power doesn't go TO the alternator Brian

03-10-2004, 06:14 PM	#7
dubie Registered User Join Date: May 2000 Location: Flin Flon, Manitoba, Canada Posts: 8,855	yeah I got that part, but where does the power for the alternator come from? __________________ My name's Tim and I'm a truckaholic My 56 Chevy shop truck build http://67-72chevytrucks.com/vboard/s...d.php?t=562795

03-10-2004, 07:09 PM	#9
dubie Registered User Join Date: May 2000 Location: Flin Flon, Manitoba, Canada Posts: 8,855	yeah, thats what I'm asking bud. Just need to know where that wire does to __________________ My name's Tim and I'm a truckaholic My 56 Chevy shop truck build http://67-72chevytrucks.com/vboard/s...d.php?t=562795

03-11-2004, 02:53 AM	#11
Bowed Registered User Join Date: Oct 2002 Location: where it's hot Posts: 1,059	The larger red wire on the alternator (post) goes to the + terminal on the battery , to charge the battery and the small red wire (connector) goes to the ignition switch Via the junction block , a thermistor or fuseable link required on that one and the brown wire (connector) goes to the voltage gauge CORRECTION - Sorry, but I just found out from another thread that I am not completly right on what I posted above , It seems the brown wire goes to the ignition switch and the small red , "well " I don't know I have to find out my self . Last edited by Bowed; 03-12-2004 at 02:22 PM.



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