Hi Ron,
Thanks again for the suggestions and advice.
So far up I have done the following;
1) checked every external bulb and fitting front & rear
- in what felt like a possible (all too obvious) eureka moment, found the left front Parker light was truly done. Smokey glass. Blown.
- all other bulbs and fittings : fine and solid.
2) Checked fuse box: all good, the connectors are spiffing new anyway. Fuses all fine.
3) Checked the junction / connector box from left of engine re main light harness. Looked in very good knick, spades in pretty good shape largely clean.
- didn’t have time to “polish” them up today. No signs of corrosion or deathly sparky dust either.
4) Two earthing points, within front end of engine bay and both on chassis.
- left side just below the harness junction box in engine bay.
- right side same position, just opposing side of engine bay.
- image of both points attached here
- drilled & then screw through inside wheel hub / outer engine bay wall.
5) Interim Brookhouse Volvo issued dipper switch (recently installed this summer) ; removed grey wire (dipped beam / regular beam) as high beam works yet only left headlight ON when diaper switched to “dipped beam”
- just out of curiosity & elimination ;
All without change to aforementioned gremlins.
Is it possible that it’s not junction box, fuse box or either front end earthing points ?
- instead simply a bad wire within the headlight harness ?
- or the wires connecting to the foot dipper switch ?
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