Hot light on after start up. - Chevelle Tech
Electrical & Wiring Troubleshooting electrical problems.

 
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post #1 of 2 (permalink) Old Jan 20th, 14, 12:30 AM Thread Starter
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Steve
 
Join Date: Dec 2010
Location: Arizona
Posts: 205
Hot light on after start up.

I researched this for a while but really could not find an answer to what I was looking for. I have been looking for an explanation of what an idiot light really is but I did not really find a good answer. My main concern is, When I start up my 72 Concours 350/350 there is a Hot light in the sweep dash that comes on and stays on for about 5-10 min then goes off. Is this normal? I read some posts that it was, and some that said it could be a defective Temp Sending unit or mis-wired. My Haynes manual really does not say anything. I just changed my Water pump and T-stat yesterday and noticed there was a sensor in the T-stat, but no wires hooked to it so I am guessing this is just serving as a plug for the hole in the top of the T-stat. I am going to check the sender tomorrow that is located in the head but wanted to see if this is really what I need to be checking into.
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post #2 of 2 (permalink) Old Jan 21st, 14, 5:58 AM
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Bryan
 
Join Date: Apr 2007
Location: San Antonio, Texas
Posts: 5,062
Re: Hot light on after start up.

perhaps someone, some time ago used a sending unit for a
63/4 Impala

Those cars had "COLD" & "HOT" lamps.
If this is the case---there should be 2 terminals on the sending unit.
move your wire to the other terminal.


The "TEMP/HOT" lamp should come on while cranking the engine and go off
as soon as you release the key.

There is an additional ground circiut in the ignition switch just for this lamp

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