Any way to "Test" idiot lights? - Team Camaro Tech
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post #1 of 6 (permalink) Old Jun 8th, 18, 02:16 PM Thread Starter
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Fred
 
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Any way to "Test" idiot lights?

Just curious... I recently replaced my under-dash wiring harness using the AAW Factory Fit harness and I'm going thru and testing all lights & circuits before calling it 'Done'.
(I also replaced all bulbs with LEDs while I was at it.)

Is it possible to test the all idiot lights?? It is a 1969.

So far, TURN SIGNAL and BRAKE lights do work ... HI BEAM and GEN lights don't work

Thanks.

1969 Camaro SS, 350(NOM), M21, 12 Bolt Posi, 01B LOS Build
1977 Camaro, 350(LM1), M20, 10 Bolt Posi, Purchased New, (SOLD)

Last edited by 77thor; Jun 8th, 18 at 03:59 PM.
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post #2 of 6 (permalink) Old Jun 8th, 18, 03:24 PM
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Re: Any way to "Test" idiot lights?

Quote:
Originally Posted by 77thor View Post
Just curious... I recently replaced my under-dash wiring harness using the AAW Factory Fit harness and I'm going thru and testing all lights & circuits before calling it 'Done'.
(I also replaced all bulbs with LEDs while I was at it.)

Is it possible to test the all idiot lights?? It is a 1969.

So far, TURN SIGNAL and BRAKE lights do work ... HI BEAM light doesn't

Thanks.
They should self test when you turn the key to the on position.

Thanks,

Jeff


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post #3 of 6 (permalink) Old Jun 8th, 18, 04:01 PM Thread Starter
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Re: Any way to "Test" idiot lights?

Quote:
Originally Posted by Chevy68 View Post
They should self test when you turn the key to the on position.

No... I've never seen that!!
The GEN light is the only one that I have ever seen turn on at that time... not the HOT and OIL lights...

Can anyone else confirm this?
(or maybe my HOT and OIL lights never worked)

1969 Camaro SS, 350(NOM), M21, 12 Bolt Posi, 01B LOS Build
1977 Camaro, 350(LM1), M20, 10 Bolt Posi, Purchased New, (SOLD)

Last edited by 77thor; Jun 8th, 18 at 04:12 PM.
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post #4 of 6 (permalink) Old Jun 8th, 18, 04:33 PM
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Re: Any way to "Test" idiot lights?

Quote:
Originally Posted by 77thor View Post
No... I've never seen that!!
The GEN light is the only one that I have ever seen turn on at that time... not the HOT and OIL lights...

Can anyone else confirm this?
(or maybe my HOT and OIL lights never worked)

Go to the chassis service manual for the 69 Camaro in the below link. Start on page 505.

Downloadable AIM's and some service manuals

Thanks,

Jeff


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post #5 of 6 (permalink) Old Jun 8th, 18, 04:44 PM
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Jeff
 
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Re: Any way to "Test" idiot lights?

Quote:
Originally Posted by Chevy68 View Post
Go to the chassis service manual for the 69 Camaro in the below link. Start on page 505.

Downloadable AIM's and some service manuals

77Thor,

It looks like the 69 Camaro is different from the 68 and does not have that feature. It funny the 69 Nova has that feature if you read on in the service manual.

Thanks,

Jeff


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post #6 of 6 (permalink) Old Jun 8th, 18, 08:22 PM
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Re: Any way to "Test" idiot lights?

To test a circuit like a TEMP idiot light, an OIL idiot light, or a high beam indicator, you just have to mimic what the sender needs to do to illuminate the light or what type of signal or voltage needs to be sent to things. The idiot lights also work with different positions of the ignition switch as well as the position of the headlight switch.

For instance, a regular TEMP idiot light gets a grounded signal from the sensor/sender to illuminate it but since you do not want to have it working all the time, and only when the engine is running, the other side of the light would get a source of power off of an ignition powered fuse. Some wiring designs had a self/test feature in that when the ignition switch was turned to the crank position, the temp idiot lights ground side became grounded to illuminate it and then once the key was released to the run position, the temp light was connected to the sender/sensor on the motor and if the sender was ungrounded the light would be off but if the engine was too hot the sender would be grounded internally and then the light would be on.

Most of the time the OIL idiot light did not have this self/test feature and like the temp idiot light, it too was powered by a fused ignition 12V source and then if the sender/sensor became grounded, the light would come on.

On a high beam indicator light, this normally was wired off of the high beam output of the floor dimmer switch and to tes tit,12V would get applied to the light and the other side of the light was grounded.

Jim

1974 Spirit Of America Nova (being restored), 1973 Nova Custom, 1968 Chevy II (Garage Find 2012)

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