Strange Headlight Issue

[Guest Martin Mchale]

Afternoon all I'm a new member and this is my first of many messages ( hopefully not )

Got a 1986 2ltr efi based rh2b+

Just changed the sealed beam units to some new fancy iridium lenses with xenon ultimate h4 bulbs.

Simple job but I accidentally blew a fuse so replaced that and now the big issue.

Side lights and angel eyes work wilt he ignition off o/s and n/s.

Turn the ignition on o/s works fine dip and main beam but the n/s nothing .

Could any one give me some advise or pointer please please .

 

Martin.

[Dave R]

possibly 2 fuses ?? mine is wired o/s & n/s on separate fuses

Edited July 24, 2014 by Dave R

[Guest Martin Mchale]

Just checked all the blade fuses again all ok

Have checked all the wires the seem tight at the lense end

Proper head scratching now

 

M

[nicko]

I had problems with 1 headlight at mot. Turned out to be bullet connectors in engine bay worked loose.

HTH

Nick

[Guest Gargoil]

I know very little about car electrics but, you seem to have proved the new bulb and wires leading up to them. Fuses are ok, so that pretty much just leaves the switch on the ignition and relay. Does the draw of the new bulbs require an uprated relay for the lights to work?

[Guest Martin Mchale]

The auto supplier said that the new builds would be fine they are just standard type bulbs with a. Different gas to make them brighter

I'll go recheck all the bullet connectors I can find and see

I'm assuming the switch gear on the column is ok as the side lights work and the dip and main on the o/s work as they should

 

M

[Guest Gargoil]

Have you seen the new bulbs (main and dip) on the nearside working? Tried swapping them around just to make sure the bulbs are ok?

[Guest Martin Mchale]

Thanks gargoil just been doing that same issue either lens and bulb connected

But did notice that the main be is coming on but it is very weak but still no dip on the N/S

So does that mean I'm looking for relays next?

 

M

[Guest Ian & Carole]

Tyr putting a new earth , just use a lead direct from the battery direct to the light as a temp. measure if you have a dim glowing light that sounds like a possible earth issue to me, but lectricary is not my strongest skill.

[Guest Gargoil]

I would be copying Ian's suggestion, which eliminates the negative side of the cct, to see if there is an improvement. If not, it might be that the relay was damaged when you had your short cct.

A multimeter comes in handy at this point.

[Guest Gargoil]

Just been looking at some cct diagrams for lights and it would seem that the +ve side is common to both headlights as it leaves the relay. This would suggest that the relay is ok. Same for the sidelights, so a bad earth from the nearside lights, does look favourite.

[Guest Martin Mchale]

Thanks all was a bad earth

Too me ages to hunt the blighter down

Eventually found it the very last crimp hidden half way up the chassis

Looks like someone ( not me ) had crimped the insulation not the wire

 

Thanks for the help very much appreciated

 

Martin

[Guest Ian & Carole]

Thanks all was a bad earth

Too me ages to hunt the blighter down

Eventually found it the very last crimp hidden half way up the chassis

Looks like someone ( not me ) had crimped the insulation not the wire

 

Thanks for the help very much appreciated

 

Martin

 

That's what makes this club so great.

 

12 posts less than 4 hours from OP and job done £15.00 true value for money. :clapping: