79' Euro - Headlights lift up but no light
06-08-2023, 02:06 PM
#1
79' Euro - Headlights lift up but no light
Hello - After some troubleshooting, I'm taking my issue to the board. My 1979 Euro spec headlights will pop up, but will not turn on. I have done the following:
1. Checked the headlight relay - functional
2. Checked the headlight safety relay - functional
3. Checked fuses
4. All other lights are functional
Other details
-The first time this happened, I turned the lights off and on and the headlights came back on
-I tried wiggling the key in the ignition as I know the headlight safety relay gets a signal from the ignition to make sure the car is running
- I have a new ignition switch, but haven't installed it yet.
Does anyone know where the contact is in the headlight mechanism that triggers the safety relay?
Any other recommended troubleshooting steps? Perhaps checking power at the CE panel?
1. Checked the headlight relay - functional
2. Checked the headlight safety relay - functional
3. Checked fuses
4. All other lights are functional
Other details
-The first time this happened, I turned the lights off and on and the headlights came back on
-I tried wiggling the key in the ignition as I know the headlight safety relay gets a signal from the ignition to make sure the car is running
- I have a new ignition switch, but haven't installed it yet.
Does anyone know where the contact is in the headlight mechanism that triggers the safety relay?
Any other recommended troubleshooting steps? Perhaps checking power at the CE panel?
06-12-2023, 05:40 PM
#2
Electron Wrangler
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There are 5 relays for your year's headlights
XIV - HL 'Dimmer' Relay - controls High or Low beam switching for the headlamps (depends on HL relay for power)
XIII - HL Relay - switches HL beam on/off (feeds to high or low beam filaments through HL 'Dimmer' Relay)
XVI - HL Control Relay - Interlocks beam on/off with headlamp pod position - on only with pods rotated full up (controls the HL Relay coil, along with HL switch)
IV - HL Safety Relay - Allows the HL pods to park (down) even after the light switch and ignition switch are off (missnamed - controls only the HL Pod Motor Relay)
III - Concealing HL Relay - drives the HL Pod motor
The only two relays you need to be concerned about given your symptoms are XIII - HL Relay and XVI - HL Control Relay. Best test - remove Relay XVI and connect the socket pins 30 & 87a with a jumper wire - with ignition on & HL switch in HL position if the HL lights come on - then relay XIII works normally and you probably need a new relay XVI - good news since relay XVI is a normal relay. If this doesn't get you the HL on then you probably need a new relay XIII which is a complex relay and more difficult/$$$ to source.
The following labels allow for better understanding and clarity:
XIV - HL Hi/Lo Beam Relay
XIII - HL Power Relay
XVI - HL/Pod Interlock Relay
IV - HL Pod Parking Relay
III - HL Pod Motor Relay
Alan
XIV - HL 'Dimmer' Relay - controls High or Low beam switching for the headlamps (depends on HL relay for power)
XIII - HL Relay - switches HL beam on/off (feeds to high or low beam filaments through HL 'Dimmer' Relay)
XVI - HL Control Relay - Interlocks beam on/off with headlamp pod position - on only with pods rotated full up (controls the HL Relay coil, along with HL switch)
IV - HL Safety Relay - Allows the HL pods to park (down) even after the light switch and ignition switch are off (missnamed - controls only the HL Pod Motor Relay)
III - Concealing HL Relay - drives the HL Pod motor
The only two relays you need to be concerned about given your symptoms are XIII - HL Relay and XVI - HL Control Relay. Best test - remove Relay XVI and connect the socket pins 30 & 87a with a jumper wire - with ignition on & HL switch in HL position if the HL lights come on - then relay XIII works normally and you probably need a new relay XVI - good news since relay XVI is a normal relay. If this doesn't get you the HL on then you probably need a new relay XIII which is a complex relay and more difficult/$$$ to source.
The following labels allow for better understanding and clarity:
XIV - HL Hi/Lo Beam Relay
XIII - HL Power Relay
XVI - HL/Pod Interlock Relay
IV - HL Pod Parking Relay
III - HL Pod Motor Relay
Alan
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Mrmerlin (08-10-2023)
08-09-2023, 12:55 PM
#3
There are 5 relays for your year's headlights
XIV - HL 'Dimmer' Relay - controls High or Low beam switching for the headlamps (depends on HL relay for power)
XIII - HL Relay - switches HL beam on/off (feeds to high or low beam filaments through HL 'Dimmer' Relay)
XVI - HL Control Relay - Interlocks beam on/off with headlamp pod position - on only with pods rotated full up (controls the HL Relay coil, along with HL switch)
IV - HL Safety Relay - Allows the HL pods to park (down) even after the light switch and ignition switch are off (missnamed - controls only the HL Pod Motor Relay)
III - Concealing HL Relay - drives the HL Pod motor
The only two relays you need to be concerned about given your symptoms are XIII - HL Relay and XVI - HL Control Relay. Best test - remove Relay XVI and connect the socket pins 30 & 87a with a jumper wire - with ignition on & HL switch in HL position if the HL lights come on - then relay XIII works normally and you probably need a new relay XVI - good news since relay XVI is a normal relay. If this doesn't get you the HL on then you probably need a new relay XIII which is a complex relay and more difficult/$$$ to source.
The following labels allow for better understanding and clarity:
XIV - HL Hi/Lo Beam Relay
XIII - HL Power Relay
XVI - HL/Pod Interlock Relay
IV - HL Pod Parking Relay
III - HL Pod Motor Relay
Alan
XIV - HL 'Dimmer' Relay - controls High or Low beam switching for the headlamps (depends on HL relay for power)
XIII - HL Relay - switches HL beam on/off (feeds to high or low beam filaments through HL 'Dimmer' Relay)
XVI - HL Control Relay - Interlocks beam on/off with headlamp pod position - on only with pods rotated full up (controls the HL Relay coil, along with HL switch)
IV - HL Safety Relay - Allows the HL pods to park (down) even after the light switch and ignition switch are off (missnamed - controls only the HL Pod Motor Relay)
III - Concealing HL Relay - drives the HL Pod motor
The only two relays you need to be concerned about given your symptoms are XIII - HL Relay and XVI - HL Control Relay. Best test - remove Relay XVI and connect the socket pins 30 & 87a with a jumper wire - with ignition on & HL switch in HL position if the HL lights come on - then relay XIII works normally and you probably need a new relay XVI - good news since relay XVI is a normal relay. If this doesn't get you the HL on then you probably need a new relay XIII which is a complex relay and more difficult/$$$ to source.
The following labels allow for better understanding and clarity:
XIV - HL Hi/Lo Beam Relay
XIII - HL Power Relay
XVI - HL/Pod Interlock Relay
IV - HL Pod Parking Relay
III - HL Pod Motor Relay
Alan