Headlight problems

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02 Nov 2012 21:14 #1 by dandjcr
dandjcr created the topic: Headlight problems
Forum Home > On the Road > Headlight problems

Peter & Sandra James Oka 374
Member
Posts: 413
Well after 8 weeks on the road we had to drive at night for the first time the other night and discovered two problems. Low beam works fine.
1/ When operating the high beam they come on momentarily but go off when the arm reaches full travel. Scary as the resulting total darkness hits! especially the first time.
Flashing the high beams works ok. Obviously there is a problem with the dip switch on the light wand but for the life of me I can't get the light switch knob off to allow removal of the shroud on the steering column. How is the knob removed?
2/ The left hand driving light works fine, but the right hand one has no power coming out of the wiring harness. The fault stays on the RH side even with a light swap.
I've left theCD manual at home and have no idea where to start without a wiring diagram. All fuses are ok.
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Oka 374 LT Van

September 30, 2011 at 8:22 AM Flag Quote & Reply

Aussie Bight Expeditions
Member
Posts: 109 Might not be in the switch as u have ashort in the light source wire as well. Might not seem as it appears. Also it could be a relay going out under full power, ie the ones behind the passenger seat have had that happen too. Can not help with the dismantle of stich Robin Wade used to have a spare many years ago Regards ABE TONY
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September 30, 2011 at 8:55 AM Flag Quote & Reply

chris @ shirley james
Member
Posts: 19
Peter,the light switch is held on with a spring loaded pin.If you look at the side of the switch where your fingers grip it to turn it,you will see a small hole,push a nail or similar into the hole,push down while pulling the knob.Can you let us all know the cause of the problem and your solution. Good luck.
Chris , OKA 96
September 30, 2011 at 9:51 AM Flag Quote & Reply

Dean & Kaye Howells
Member
Posts: 79
Hi Peter & Sandra, Just had a look through the LT circuits. One question, Does the hi beam warning light stay on or flick on/off with the high beam? if it stays on you have a dirty/loose connection between the dipswitch and low beam fuse F14 (lt. grn wire) or between this fuse and hi beam filament (lt.grn also). Could also be a faulty fuse or holder. If the warning light follows the hi beam ie. flicks, you have a faulty switch or loose connection on the back of the switch. As there is no hi-beam relay the full current to the headlights goes through this switch. A terrible design and one which is gauranteed to cause voltage drop and ultimate contact failure.
The dip beam switch has two sets of three position contacts. One set for dipping the headlights and one set for the hi beam flash. Only half of each set is used for each function. It should be possible to swap the wires over on the back of the switch ie. between each set of contacts as the high beam flash is OK.
The dip switch is a three position switch, LO-HI -HBF(hi beam flash).
Segment 1 switches the HBF circuit (orange wire) from LO (no connection) to HI (no connection) and HBF (lt. grn wire).
Segment 2 switches the LO-HI circuit (lt. blue wire) from LO (tan wire) to HI (lt. grn wire) and HBF (no connection).
So as I said, it is possible to do a swap if you're game.
Deano.



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September 30, 2011 at 11:11 AM Flag Quote & Reply

Dean & Kaye Howells
Member
Posts: 79
As for the driving light issue. This does have a relay which is obviously OK as one driving light works. The circuit shows a purple wire from the relay (R3) to a join near the LH driving light where another purple wire goes off to the RH driving light. You've checked the lamps so its either a poor connection somewhere between this commoning point and the RH driving light, its connector or a bad earth connection for the RH light.
It is not a short circuit fault as this would cause the driving light fuse (F19) to blow.
As a general rule multimeters are not much good for automotive fault finding, a good old test lamp is better as it draws current and shows up poor connections better. Also easier to use.

Good Luck

Deano
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September 30, 2011 at 11:37 AM Flag Quote & Reply

Peter & Sandra James Oka 374
Member
Posts: 413
Wow, thanks to everyone for the responses, when we have acamp with no rain I'll use the info to sort out the problem. Will report bck with the results.
Thanks again
Peter
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Oka 374 LT Van

October 1, 2011 at 9:13 AM Flag Quote & Reply

Peter & Sandra James Oka 374
Member
Posts: 413
Had a quick look at the light switch, couldn't be bothered ripping everything apart when on the road and it isn't critical so will leave it till I get home
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Oka 374 LT Van

October 1, 2011 at 3:45 PM

David and Janet Ribbans - Oka 148
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