66- Pop up headlights not working, where to start trouble shooting ?
05-24-2015, 10:24 AM
#1
Burning Brakes
Thread Starter
66- Pop up headlights not working, where to start trouble shooting ?
Pop up headlights ain't working on our 66. I know the motors are fine I rebuilt & tested them.
I removed the switch from dash, contacts were corroded- cleaned them. Now when i move the switch lights come on in the instrument panel but nothing else.
What next ? I don't know how to test the circuit breaker- can someone clue me in there ?
After that I'll check if there's 12v at the connection at the motors.
Thanks-
I removed the switch from dash, contacts were corroded- cleaned them. Now when i move the switch lights come on in the instrument panel but nothing else.
What next ? I don't know how to test the circuit breaker- can someone clue me in there ?
After that I'll check if there's 12v at the connection at the motors.
Thanks-
05-24-2015, 01:28 PM
#2
Pro
Headlights
Pop up headlights ain't working on our 66. I know the motors are fine I rebuilt & tested them.
I removed the switch from dash, contacts were corroded- cleaned them. Now when i move the switch lights come on in the instrument panel but nothing else.
What next ? I don't know how to test the circuit breaker- can someone clue me in there ?
After that I'll check if there's 12v at the connection at the motors.
Thanks-
I removed the switch from dash, contacts were corroded- cleaned them. Now when i move the switch lights come on in the instrument panel but nothing else.
What next ? I don't know how to test the circuit breaker- can someone clue me in there ?
After that I'll check if there's 12v at the connection at the motors.
Thanks-
The circuit breaker is just a normally closed switch that opens on overload and automatically resets. Check with continuity meter.
Randy
05-24-2015, 01:42 PM
#3
Team Owner
Check the engine harness where it plugs into the Firewall, under the Master Cylinder...could be corroded there...
05-24-2015, 02:33 PM
#4
Race Director
05-24-2015, 05:01 PM
#5
Le Mans Master
Ryan - Can't tell from your writeup but are you getting any movement or sound at all from the installed motors? If not, maybe the Black ground wire isn't making good contact. They usually have a star washer under the screw.
Mike T - Prescott AZ
Mike T - Prescott AZ
05-24-2015, 06:11 PM
#6
Team Owner
I'm not try to be a smart a$$...
It sounds like you just cleaned harness connection to the HL switch...not knowing about he other 'switch'...
BUT:::
You do know there is the 'rollover' switch on bottom of instrument cluster below the HL switch?...just pulling on the HL switch "WILL NOT" make the HL 'popup'...
It sounds like you just cleaned harness connection to the HL switch...not knowing about he other 'switch'...
BUT:::
You do know there is the 'rollover' switch on bottom of instrument cluster below the HL switch?...just pulling on the HL switch "WILL NOT" make the HL 'popup'...
05-24-2015, 06:14 PM
#7
Burning Brakes
Thread Starter
No sound or movement from the headlight motors at all when i push the switch.
I know the grounds are attached. Will have to look and see if I used a star washer with them.
How can i test the circuit breaker to see if its working ?
Thanks-
I know the grounds are attached. Will have to look and see if I used a star washer with them.
How can i test the circuit breaker to see if its working ?
Thanks-
05-24-2015, 06:54 PM
#9
Team Owner
05-24-2015, 06:56 PM
#10
Burning Brakes
Thread Starter
Jack- The rollover switch at bottom of dash is the one i took apart and cleaned the contacts. Was hoping for movement after that but no such luck.
I did test the motors with 12v off the battery.
I'll check the circuit breaker out- thanks Randy. Will also check voltage at connector at motor and that connection is correct.
The wiring harness connector at the firewall had some dirt and crud in it. Cleaned it out but didn't change anything as far as HL function.
Can either the HL pull **** or the button on the floor that activates the brights affect the pop up function if anything is wrong with those circuits ?
Thx-
I did test the motors with 12v off the battery.
I'll check the circuit breaker out- thanks Randy. Will also check voltage at connector at motor and that connection is correct.
The wiring harness connector at the firewall had some dirt and crud in it. Cleaned it out but didn't change anything as far as HL function.
Can either the HL pull **** or the button on the floor that activates the brights affect the pop up function if anything is wrong with those circuits ?
Thx-
05-24-2015, 07:03 PM
#11
Melting Slicks
I recently had to replace my rollover switch...I had taken it apart and cleaned it (which helped slightly), but it was still very intermittent when it would cooperate. I wonder if yours has given up too?
05-24-2015, 07:07 PM
#12
Team Owner
Jack- The rollover switch at bottom of dash is the one i took apart and cleaned the contacts. Was hoping for movement after that but no such luck.
I did test the motors with 12v off the battery.
I'll check the circuit breaker out- thanks Randy. Will also check voltage at connector at motor and that connection is correct.
The wiring harness connector at the firewall had some dirt and crud in it. Cleaned it out but didn't change anything as far as HL function.
Can either the HL pull **** or the button on the floor that activates the brights affect the pop up function if anything is wrong with those circuits ? If you'll follow those wires from the switch, you'll find your problem, first make sure you have the 12v supply through the cb, then go to the switch and follow the wires. Use the diagram I posted.
Thx-
I did test the motors with 12v off the battery.
I'll check the circuit breaker out- thanks Randy. Will also check voltage at connector at motor and that connection is correct.
The wiring harness connector at the firewall had some dirt and crud in it. Cleaned it out but didn't change anything as far as HL function.
Can either the HL pull **** or the button on the floor that activates the brights affect the pop up function if anything is wrong with those circuits ? If you'll follow those wires from the switch, you'll find your problem, first make sure you have the 12v supply through the cb, then go to the switch and follow the wires. Use the diagram I posted.
Thx-
05-24-2015, 07:12 PM
#13
Team Owner
Did you ever check the 'firewall harness' plug under the Master Cylinder like I mentioned/suggested earlier...?
05-24-2015, 07:54 PM
#14
Pro
Jack- The rollover switch at bottom of dash is the one i took apart and cleaned the contacts. Was hoping for movement after that but no such luck.
I did test the motors with 12v off the battery.
I'll check the circuit breaker out- thanks Randy. Will also check voltage at connector at motor and that connection is correct.
The wiring harness connector at the firewall had some dirt and crud in it. Cleaned it out but didn't change anything as far as HL function.
Can either the HL pull **** or the button on the floor that activates the brights affect the pop up function if anything is wrong with those circuits ?
Thx-
I did test the motors with 12v off the battery.
I'll check the circuit breaker out- thanks Randy. Will also check voltage at connector at motor and that connection is correct.
The wiring harness connector at the firewall had some dirt and crud in it. Cleaned it out but didn't change anything as far as HL function.
Can either the HL pull **** or the button on the floor that activates the brights affect the pop up function if anything is wrong with those circuits ?
Thx-
Did the headlights ever raise and lower after you installed the rebuilt motors?
If you have voltage at the headlight connector then you don't need to worry about firewall connectors, headlight switches,circuit breakers, etc.
To check for voltage at the HL connector put one voltmeter probe in the connector and the other probe to ground and have a helper activate the raise lower switch. Telling us if you have voltage at the connector or not isolates where the problem may be.
Randy
05-24-2015, 10:13 PM
#15
Burning Brakes
Thread Starter
Jack- Yes, i took the wiring connector apart at the firewall. It had some dirt/crud in it that I cleaned out but no change in HL function.
Randy-
I see why the suggestions been made about starting at the HL connection and working your way back. Makes good sense after reading your comment that if there's power there then there's not a problem at the firewall connector, headlight switch, circuit breaker.
To answer your question- no the HL's have not moved since I installed them after the rebuild. This is a barn find car that my Dad & I did a frame off restoration on. I doubt these HL's have moved in 20+ years.
I'll let ya know what I find out tomorrow.
Randy-
I see why the suggestions been made about starting at the HL connection and working your way back. Makes good sense after reading your comment that if there's power there then there's not a problem at the firewall connector, headlight switch, circuit breaker.
To answer your question- no the HL's have not moved since I installed them after the rebuild. This is a barn find car that my Dad & I did a frame off restoration on. I doubt these HL's have moved in 20+ years.
I'll let ya know what I find out tomorrow.
05-24-2015, 10:34 PM
#16
Team Owner
When you had the motors off, did you try and move/rotate the HL bucket to make sure they moved freely and not bind?
On the firewall harness...did you plug them into the correct plug?
On the firewall harness...did you plug them into the correct plug?
Last edited by 66jack; 05-24-2015 at 10:36 PM.
05-24-2015, 10:44 PM
#17
Race Director
Jack- Yes, i took the wiring connector apart at the firewall. It had some dirt/crud in it that I cleaned out but no change in HL function.
Randy-
I see why the suggestions been made about starting at the HL connection and working your way back. Makes good sense after reading your comment that if there's power there then there's not a problem at the firewall connector, headlight switch, circuit breaker.
To answer your question- no the HL's have not moved since I installed them after the rebuild. This is a barn find car that my Dad & I did a frame off restoration on. I doubt these HL's have moved in 20+ years.
I'll let ya know what I find out tomorrow.
Randy-
I see why the suggestions been made about starting at the HL connection and working your way back. Makes good sense after reading your comment that if there's power there then there's not a problem at the firewall connector, headlight switch, circuit breaker.
To answer your question- no the HL's have not moved since I installed them after the rebuild. This is a barn find car that my Dad & I did a frame off restoration on. I doubt these HL's have moved in 20+ years.
I'll let ya know what I find out tomorrow.
They block contacts also need to be clean.
Larry
05-24-2015, 11:37 PM
#18
Melting Slicks
Member Since: May 2004
Location: Willowbrook IL
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St. Jude Donor '13-'14-'15-'16
You've been given good info on how to test and troubleshoot the motors, what are the results?
When you reassembled the motors back onto the car, did you reuse the original short ground wire attaching screw? If you used a generic longer screw you may have tightened the screw into the windings of the motor and shorted out the windings.
DonO
When you reassembled the motors back onto the car, did you reuse the original short ground wire attaching screw? If you used a generic longer screw you may have tightened the screw into the windings of the motor and shorted out the windings.
DonO
05-25-2015, 10:52 AM
#20
Burning Brakes
Thread Starter
Thanks for all the input, to answer some questions;
Yes the HL buckets move freely, no issues there.
I did remove both wiring harness plugs from the firewall and ensured i plugged them back in correctly.
I used the correct short screws for the ground wires on the HL motors. I learned about that potential problem from reading in this great site.
2 of our boys have a baseball tourney this weekend but I'll find some time to get a volt meter on the wiring connection today and let you know what it shows.
Previous owner Bubba has cut some wires both under the dash and in the engine compartment. I learned from 66Jack that one of those cut is for the back-up lights. Hopefully none of the others cut are affecting the HL motors. We'll see.
Again many thanks.
Yes the HL buckets move freely, no issues there.
I did remove both wiring harness plugs from the firewall and ensured i plugged them back in correctly.
I used the correct short screws for the ground wires on the HL motors. I learned about that potential problem from reading in this great site.
2 of our boys have a baseball tourney this weekend but I'll find some time to get a volt meter on the wiring connection today and let you know what it shows.
Previous owner Bubba has cut some wires both under the dash and in the engine compartment. I learned from 66Jack that one of those cut is for the back-up lights. Hopefully none of the others cut are affecting the HL motors. We'll see.
Again many thanks.