No Drivers side Rear Lights -- Update!

Gotta love that wiring . . .
profcucchi
Posts: 248
Joined: Sun Oct 23, 2011 2:12 pm
Your car is a: 1979 Fiat 2000
Location: Toronto, On

No Drivers side Rear Lights -- Update!

Postby profcucchi » Sun Oct 02, 2016 9:11 pm

Hi guys, easy question...

Drivers side rear lights: signal works, brake lights work, but running lights and side marker don't.

New bulbs, and no change.

The ground was remade with an O ring as the PO just wrapped it around the threaded bolt with the nut.

Left side is working fine.

Quick clean? Something else?

Thanks
Last edited by profcucchi on Mon Oct 10, 2016 6:40 pm, edited 1 time in total.
1979 Fiat 2000 "Luigi"

80spiddy
Posts: 180
Joined: Thu Mar 05, 2015 8:06 pm
Your car is a: 1980 spider 2000

Re: No Drivers side Rear Lights

Postby 80spiddy » Sun Oct 02, 2016 9:21 pm

Try unplugging the whole connector and plug back in.

profcucchi
Posts: 248
Joined: Sun Oct 23, 2011 2:12 pm
Your car is a: 1979 Fiat 2000
Location: Toronto, On

Re: No Drivers side Rear Lights

Postby profcucchi » Sun Oct 02, 2016 9:26 pm

80spiddy wrote:Try unplugging the whole connector and plug back in.


Hi 80spiddy,

I pulled the connectors and they look like they need a good cleaning. I found this page
http://www.fiatspider.com/f15/viewtopic.phpf=6&t=17600&p=137232&hilit=Drivers+side+rear+lights#p137232

And it looks like what I need.
1979 Fiat 2000 "Luigi"

spider2081
Patron 2024
Patron 2024
Posts: 2967
Joined: Fri Jan 27, 2006 11:45 pm
Your car is a: 1981 Spider 2000
Location: Wallingford,CT
Contact:

Re: No Drivers side Rear Lights

Postby spider2081 » Mon Oct 03, 2016 11:54 am

I think the left side and right side parking lights have separate fuses. Fuses 7 and 8 are the ones associated with the rear parking lights

User avatar
argonaut
Posts: 66
Joined: Tue Nov 17, 2015 8:32 pm
Your car is a: 1981 Spider 2000
Location: Long Beach, CA

Re: No Drivers side Rear Lights

Postby argonaut » Wed Oct 05, 2016 2:34 am

I was having issues with the lights on my 81. Brake lights and side marker on the driver side if I recall correctly. Anyway I found that the connections on the circuit boards were the problem. I wasn't getting continuity between the graces on the board and the connectors. I had the heat and apply some solder to the bad joints. I also thoroughly cleaned everything and applied dielectric grease. The taillight lens gaskets let water in and then corrosion forms. Since I completed these repairs the lights out back have been working perfectly.
Hope it helps you.
Jason M.

1964 Chevy K20 Suburban
1966 Chevy K20 Pickup
1981 Fiat Spider 2000
1996 Ford Bronco Supercharged
2008 Honda CBR1000RR
2005 Honda RC51
1981 Honda CB750C

User avatar
argonaut
Posts: 66
Joined: Tue Nov 17, 2015 8:32 pm
Your car is a: 1981 Spider 2000
Location: Long Beach, CA

Re: No Drivers side Rear Lights

Postby argonaut » Wed Oct 05, 2016 2:34 am

I was having issues with the lights on my 81. Brake lights and side marker on the driver side if I recall correctly. Anyway I found that the connections on the circuit boards were the problem. I wasn't getting continuity between the graces on the board and the connectors. I had the heat and apply some solder to the bad joints. I also thoroughly cleaned everything and applied dielectric grease. The taillight lens gaskets let water in and then corrosion forms. Since I completed these repairs the lights out back have been working perfectly.
Hope it helps you.
Jason M.

1964 Chevy K20 Suburban
1966 Chevy K20 Pickup
1981 Fiat Spider 2000
1996 Ford Bronco Supercharged
2008 Honda CBR1000RR
2005 Honda RC51
1981 Honda CB750C

profcucchi
Posts: 248
Joined: Sun Oct 23, 2011 2:12 pm
Your car is a: 1979 Fiat 2000
Location: Toronto, On

Re: No Drivers side Rear Lights

Postby profcucchi » Thu Oct 06, 2016 7:26 pm

argonaut wrote:I was having issues with the lights on my 81. Brake lights and side marker on the driver side if I recall correctly. Anyway I found that the connections on the circuit boards were the problem. I wasn't getting continuity between the graces on the board and the connectors. I had the heat and apply some solder to the bad joints. I also thoroughly cleaned everything and applied dielectric grease. The taillight lens gaskets let water in and then corrosion forms. Since I completed these repairs the lights out back have been working perfectly.
Hope it helps you.


I gave a good cleaning to the board, and the drivers side is still out.

Now my front drivers signal is out too.
1979 Fiat 2000 "Luigi"

80spiddy
Posts: 180
Joined: Thu Mar 05, 2015 8:06 pm
Your car is a: 1980 spider 2000

Re: No Drivers side Rear Lights

Postby 80spiddy » Thu Oct 06, 2016 7:52 pm

Do you have power at the lead wire connecting to the board or light?

spider2081
Patron 2024
Patron 2024
Posts: 2967
Joined: Fri Jan 27, 2006 11:45 pm
Your car is a: 1981 Spider 2000
Location: Wallingford,CT
Contact:

Re: No Drivers side Rear Lights

Postby spider2081 » Thu Oct 06, 2016 8:19 pm

I gave a good cleaning to the board, and the drivers side is still out.


I am not sure which side of the car your lights are not working. Is you car a right hand drive car???
Also do you have a test light or a volt meter to make tests with ??

profcucchi
Posts: 248
Joined: Sun Oct 23, 2011 2:12 pm
Your car is a: 1979 Fiat 2000
Location: Toronto, On

Re: No Drivers side Rear Lights

Postby profcucchi » Thu Oct 06, 2016 9:49 pm

spider2081 wrote:
I gave a good cleaning to the board, and the drivers side is still out.


I am not sure which side of the car your lights are not working. Is you car a right hand drive car???
Also do you have a test light or a volt meter to make tests with ??


Now these questions I can answer! The car is left hand drive. The drivers side signal (front and rear) and running lights are out.

I have a volt meter and I'll check the 4th lead, my wiring diagrams shows this to be a possibility.

Thanks
1979 Fiat 2000 "Luigi"

spider2081
Patron 2024
Patron 2024
Posts: 2967
Joined: Fri Jan 27, 2006 11:45 pm
Your car is a: 1981 Spider 2000
Location: Wallingford,CT
Contact:

Re: No Drivers side Rear Lights

Postby spider2081 » Fri Oct 07, 2016 8:13 am

I don't think you have a single issue causing all you light problems. I would focus on the parking light issue first. You did not mention if both of your rear marker plate lights are working.
I would remove the rear light board again so you can measure voltage. I would remove the lens on the left front parking light assembly. Remove the bulb and test it. If its good clean socket and reinstall the bulb. If the bulb is suspect replace it with a known good bulb. Check the ground for the socket at the drivers side ground spider. You will find a 2 pin connector with w yellow/black and a blue/black wire in it. follow these wires to the black jacket. There you will see a black wire follow it to the ground pod. This is the ground wire for the left front signal/park light socket.
Measure the voltage on the yellow black wire at the 2 pin plug with the plugs together (slightly pulled apart to access the pin) It should be battery voltage and present with the parking light switch in the "park" position.
Measure the voltage on the yellow/red wire entering the rear light assembly with the light assembly plugged in. It too should be battery voltage with the light switch in the "park" position.

profcucchi
Posts: 248
Joined: Sun Oct 23, 2011 2:12 pm
Your car is a: 1979 Fiat 2000
Location: Toronto, On

Re: No Drivers side Rear Lights -- Update!

Postby profcucchi » Mon Oct 10, 2016 6:46 pm

Hello, Everyone.

Thanks for all the help.

In short:

Passenger side works.
Drivers side head lamp, brake and reverse lights work.
Side markers work.

So... it must be the switch. Thanks to Mark at AllisonAutomotive.

Now, I'm off to read how to fix that...
1979 Fiat 2000 "Luigi"

spider2081
Patron 2024
Patron 2024
Posts: 2967
Joined: Fri Jan 27, 2006 11:45 pm
Your car is a: 1981 Spider 2000
Location: Wallingford,CT
Contact:

Re: No Drivers side Rear Lights -- Update!

Postby spider2081 » Tue Oct 11, 2016 8:22 am

So... it must be the switch.


I'm not sure what problem you are troubleshooting. If the parking lights are working on the right side of the car and not the left I don't think a switch would cause that problem.

profcucchi
Posts: 248
Joined: Sun Oct 23, 2011 2:12 pm
Your car is a: 1979 Fiat 2000
Location: Toronto, On

Re: No Drivers side Rear Lights -- Update!

Postby profcucchi » Mon Apr 24, 2017 10:57 pm

Argh, it happened again, but this time I figured it out before going crazy.

Checked the fuse and it was burnt. New fuse and I have lights again.

Someday, I'll react like a rational person... :wink:
1979 Fiat 2000 "Luigi"


Return to “Electrical Issues”

Who is online

Users browsing this forum: No registered users and 30 guests