Technical Headlamp wiring

[NigelO]

I need to splice into the high-beam supply to activate a relay for some LED spotlamps I'm fitting.

Google has failed me and I can't find a wiring diagram - can anyone help?

2007 Panda 169 4x4

Photo of the headlamp connector

 

[NigelO]

Damn - I thought I was being clever.... I had a spare micro-fuse piggyback connector, so I used that in the high beam fuse location. This would have been brilliant if the fuse wasn't on the supply side of the column switch, meaning it's permanently live....

Back to Plan A - need to know which of the wires to the headlamp is for the main beam

 

[NigelO]

All sorted.... I disconnected both headlamps and put a multimeter on the terminals of the headlamp plug - worked out which one was the main beam feed and spliced into it.

 

[The Panda Nut]

Im not sure how you have wired this. I did fog lamps on ours, I pinched the switch power from the side lights, by the headlight connector. As the whole thing is ECU controlled I was nervous anout any remote possibility of a short at some point, so fused the power line right by the splice before it went off to the relay, also the main live which I took from the battery, and the other end of the switch wire in the car so in the end it had 4 fuses including the 1 in the car. I think protecting the ecu from any power spikes is probably VIP. Glad you sorted it. I now always use the LED fuses, useful particularly for stuff like this as you can see immediately if they are blown.

 

[koalar]

Too late but for others

Headlamp wiring colours | FIAT Panda (Mk3)

Hi, quick question regarding the colours of the wires going to the plug on the back of the headlight unit. I'm just wiring in some additional LED units using the same feeds and need to check the wiring colours as the Haynes manual seems a little vague. I'm thinking the Grey/Black is the Side...

www.fiatforum.com

 

[dagdromer]

If I remember correct then the connector on the BSI for the headlights tend to get hot and melt into the BSI. Adding even extra stuff to the connection does not help in this.

 

[koalar]

Done properly the extra current should not be a problem 150mA typical,


Done incorrectly the flyback as the coil collapses @ over 100V has the potential to damage the BSI

Here a typical 12v relay

A relay with a built in diode built in is required, they only coat a few pence more