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Old 08-09-2018, 08:00 PM   #1
jeffg1010
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Help identifying a few wires

So, I am working on a 72 Blazer. I got it running and took it around the block but it didn't make it all the way. So, I towed it home and now it is dead in the water.

Clicks but will not crank.

While inspecting it, I noticed a few wires that arent connected. Two are melted and look like junk. The other just isnt hooked up. You veterans are gonna probably think these are stupid questions but bear with me. We all gotta start somewhere

The first is a yellow wire that comes a harness from the junction box for the fuse panel. It appears that it went somewhere around the starter. It is melted from header heat. Had some insulation on it.

The other is a green wire that ran the same route. It also comes from the junction box for the fuse panel in the same harness as the yellow wire (also had another yellow wire that went to the distributor and a purple wire. Crosses over the block and appears to have also connected to something around the starter. It still has a spade connector on it.

The third comes from another harness around the distributor. It has a two way flat plug on it. I am gonna upload pics from my phone ...

It needs a new harness all together because it is a mess, but like most guys, that isn't gonna happen right now.
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Old 08-09-2018, 08:51 PM   #2
dmjlambert
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Re: Help identifying a few wires

You may be able to figure out most of it by looking at the wiring diagram.
http://67-72chevytrucks.com/vboard/s...49#post7809749
It is the pickup truck version, but probably not too different for Blazer. Look at the wire colors and what area of the truck they are located. I think the green wire with cloth cover is the temperature sensor wire. The yellow wire near starter is to provide 12V from the starter to a points distributor during start up, because the points distributor gets lower voltage running power through a resistor wire (white/orange/purple cloth wire) that comes from the firewall connector. If you have an HEI distributor then you are probably not using the yellow wire.
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Old 08-10-2018, 09:23 AM   #3
jeffg1010
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Re: Help identifying a few wires

Thatís good info. Does anybody have a clue what the flat plug is?
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1972 Blazer CST 2wd- My son Sam's Project "S" Project "S"
1970 Suburban - SOLD "One Bad Burb" Photobucket Album
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Old 08-16-2018, 06:51 PM   #4
michael bustamante
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Re: Help identifying a few wires

purple wire goes to the starter solenoid also im sure. opposite the yellow wire
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Old 08-16-2018, 10:44 PM   #5
franken
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Re: Help identifying a few wires

Green insulated wire is typically the temp gauge/light but the color wiring diagram would allow you to help yourself.
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