Help Needed With Engine Bay Wireing

[lloyd1986 2 1 Cars]

Hi guys ive searched the forums but no joy can someone solve my problem when i turn my side lights on my back ones come on but my front ones light up inside the headlight bulb not the side light bulb ??? Also i have no live to my horn is this anything to do with problem ive checked fuses.

[jackherer 543]

The headlights are meant to come on with the sidelights and the ignition on, this is called dim-dip. The sidelight bulbs should come on too, they often have corrosion on the plugs that stops them from working.

[jackherer 543]

The horn could be due to corroded terminals and wiring too, or if it is a 1.9 with air horns there is a relay that could have failed.

[lloyd1986 2 1 Cars]

Cheers for the reply as for the side lights they dont come on will check connectors tomorrow how many earths do the side lights have and the horn i replaced the live terminal today and the relay it earths to the body it works as i run a live straight from battery and it honked

[jackherer 543]

The sidelights and headlights use the same earth point so if the main bulb is working it isn't likely to be the earth.

 

When you replaced the horn live terminal what did the copper wire look like? If it was dull, black or green then it is useless, it needs to be bright, shiny and gold coloured. If it is corroded cut a short amount off and see if it is better and keep cutting it back until you get to good wire, you might have to go back a fair way! The sidelight wiring might need the same treatment too.

[lloyd1986 2 1 Cars]

The wire on the horn was a mix of dark copper and shiney copper i cut it back an inch and put a new connector on should the horn relay click like the headlight relay ????

[jackherer 543]

The horn relay should click, if it doesn't you might have a faulty relay or it could be the button on the stalk.

[lloyd1986 2 1 Cars]

Jackherer ur advice about side lights was spot on it was a dodgey earth on drivers side slam panel just need to sort horn out now