Choke Light 1981
Thread Starter
7th Gear
Joined: May 2011
Posts: 7
Likes: 0
Choke Light
I think I found the relay, 2 brown, 1 blue, 1 green white
If I unplug this relay the CHOKE LIGHT stayes on!
Plug it back in
If I Unplug the blue wire at the choke heater unit on the carborator it self the light goes OUT.
I am lost!!!!!
What to do?????????
If I unplug this relay the CHOKE LIGHT stayes on!
Plug it back in
If I Unplug the blue wire at the choke heater unit on the carborator it self the light goes OUT.
I am lost!!!!!
What to do?????????
Instructor
Joined: Apr 2011
Posts: 137
Likes: 0
From: Goose Creek SC
Hey Andy,
Going through posts to gets some idea's on what my problem may be and I ran across this post of yours. I have an 81. When I got the car, the electric choke was not connected. Someone had cut the pigtail off; all I had was a green wire. I could not find a pigtail to fit. To make a long story short, I got the electric coil & pigtail from Cliffs. When I connect the pigtail, my Choke Light stays on and I get a rough Idle. Your Rough Idle caught my attention. Why would I get a rough idle? The butterfly on the carb never changed positions when I plugged into the electric choke. I'm going to go and look to see if I have a bad fuse. Thanks Andy.
Mark
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Le Mans Master
Joined: Feb 2011
Posts: 5,943
Likes: 61
From: Southern NH
I don't have my service manual with me at work but I think I remember seeing the wiring diagram and the choke light circuit goes through the oil pressure switch I believe?
It's a simple circuit if someone can find a wiring diagram and post it up here, it shouldn't be hard to find out where to look for the problem. I just don't remember off the top of my head.
It's a simple circuit if someone can find a wiring diagram and post it up here, it shouldn't be hard to find out where to look for the problem. I just don't remember off the top of my head.
Instructor
Joined: Apr 2011
Posts: 137
Likes: 0
From: Goose Creek SC
Thanks SixFooter, how in the world can I get the 20amp fuse out to check it? It is way up at the top and I can seem to get a hold of it to pull it out. Am I missing a trick here?
Thanks
Instructor
Joined: Apr 2011
Posts: 137
Likes: 0
From: Goose Creek SC
I don't have my service manual with me at work but I think I remember seeing the wiring diagram and the choke light circuit goes through the oil pressure switch I believe?
It's a simple circuit if someone can find a wiring diagram and post it up here, it shouldn't be hard to find out where to look for the problem. I just don't remember off the top of my head.
It's a simple circuit if someone can find a wiring diagram and post it up here, it shouldn't be hard to find out where to look for the problem. I just don't remember off the top of my head.
Le Mans Master
Joined: Feb 2011
Posts: 5,943
Likes: 61
From: Southern NH
According to my service manual, that's not the correct wiring diagram for an '81. I'll take a pic and get it up here.
Edit: oops I was wrong. I was looking at the actual choke heater circuit, not the circuit for the light.
It says to check the fuse as already stated. If the fuse is good, check for voltage at the choke heater connector in cicuit 250 (brn wire)
It could also mean there no power at the actual choke heater.
Edit: oops I was wrong. I was looking at the actual choke heater circuit, not the circuit for the light.
It says to check the fuse as already stated. If the fuse is good, check for voltage at the choke heater connector in cicuit 250 (brn wire)
It could also mean there no power at the actual choke heater.
Last edited by qwank; Dec 13, 2011 at 09:12 PM.
Racer
Joined: Dec 2007
Posts: 342
Likes: 29
From: vancouver washington
Drifting
Joined: Aug 2009
Posts: 1,635
Likes: 8
From: Enid Oklahoma
I third that motion, I replaced my Alternator and she cleared right up. 
Le Mans Master
Joined: Jan 2006
Posts: 9,192
Likes: 27
From: Boca Raton Florida
I use a scribe/probe with a bent tip to get fuses out.
Also , yes the diodes in the alternator can cause the choke light to stay on. With everything normal and the engine running you have 12v applied to both sides of the choke relay coil, effectively disabling it, the same on the chooke light. If the fuse opens up, you lose voltage on one side of the relay coil and the relay opens and the choke circuit becomes the ground side for the light. Its kind of a left handed way to do things, but it works.
Also , yes the diodes in the alternator can cause the choke light to stay on. With everything normal and the engine running you have 12v applied to both sides of the choke relay coil, effectively disabling it, the same on the chooke light. If the fuse opens up, you lose voltage on one side of the relay coil and the relay opens and the choke circuit becomes the ground side for the light. Its kind of a left handed way to do things, but it works.
Instructor
Joined: Apr 2011
Posts: 137
Likes: 0
From: Goose Creek SC
I use a scribe/probe with a bent tip to get fuses out.
Also , yes the diodes in the alternator can cause the choke light to stay on. With everything normal and the engine running you have 12v applied to both sides of the choke relay coil, effectively disabling it, the same on the chooke light. If the fuse opens up, you lose voltage on one side of the relay coil and the relay opens and the choke circuit becomes the ground side for the light. Its kind of a left handed way to do things, but it works.
Also , yes the diodes in the alternator can cause the choke light to stay on. With everything normal and the engine running you have 12v applied to both sides of the choke relay coil, effectively disabling it, the same on the chooke light. If the fuse opens up, you lose voltage on one side of the relay coil and the relay opens and the choke circuit becomes the ground side for the light. Its kind of a left handed way to do things, but it works.
Melting Slicks
Joined: Jun 2000
Posts: 3,431
Likes: 298
From: MN-C3, AZ-C7
Damm, I'll have to look into that next spring. My charging light is also dimly lighting so the alternator has been suspected for that light also. The choke light has been flicking on and off for years now!
Thanks!!!!
Racer
Joined: May 2008
Posts: 327
Likes: 2
From: Livermore California
i too have the same problem ... light won't go out.
choke relay ... okay (even bought new and returned)
fuses okay ... i use a fuse clip (have had it for years)
cleaned altenator ... no change (even bought new, installed and put the old one back in and returned)
repaired charging connector ... had to resolder blade connectors, both broken and greased up.
choke works, stalls engine when i push close.
any other clues? thanks. this forums will always rock!
choke relay ... okay (even bought new and returned)
fuses okay ... i use a fuse clip (have had it for years)
cleaned altenator ... no change (even bought new, installed and put the old one back in and returned)
repaired charging connector ... had to resolder blade connectors, both broken and greased up.
choke works, stalls engine when i push close.
any other clues? thanks. this forums will always rock!