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Post by 152bobby on Aug 4, 2019 10:11:47 GMT
Ok, I have had another go and with the same results. Any DRL light that's connected to the original culprit cable still flickers. I have swapped both existing DRL lights round, have also tried the new set I have and anything that is connected to it flickers.
I have also checked the grounding wire, there is only one for the whole kit and it's securely connected to the body of the car.
It's a simple set up, small ECU box, with 5 cables coming out, 2 for the DRL lights, white wire for the headlight, 1 with inline fuse to ignition and 1 for the ground.
So I'm guessing the small ECU box is knackered.
Does anyone agree ?
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Post by philip42h on Aug 4, 2019 10:38:58 GMT
Ok, I have had another go and with the same results. Any DRL light that's connected to the original culprit cable still flickers. I have swapped both existing DRL lights round, have also tried the new set I have and anything that is connected to it flickers. I have also checked the grounding wire, there is only one for the whole kit and it's securely connected to the body of the car. It's a simple set up, small ECU box, with 5 cables coming out, 2 for the DRL lights, white wire for the headlight, 1 with inline fuse to ignition and 1 for the ground. So I'm guessing the small ECU box is knackered. Does anyone agree ? Can you swap over the two DRL cables? And/or replace the 'culprit cable' before swapping out the box? |
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Post by firemac on Aug 4, 2019 10:51:33 GMT
Might sound daft but is there any way that you can spray the inside of the box with WD40? Maybe a drain hole, a seam or a gap where the terminals are connected. It might be a bit of moisture inside the unit or the insulation breaking down slightly on the internal wiring. It's amazing what WD40 will cure.  |
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Post by 152bobby on Aug 4, 2019 10:52:57 GMT
I'll try it👍
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Post by 152bobby on Aug 4, 2019 15:32:35 GMT
It would be easy if the box was screwed together, but it's sealed. If it was accessible, I would now look at just swapping the ECU, but I think I'll be lucky to even be able to squirt in some DW40. If I can't, now that I have a whole new set, I will just take out the old wiring and replace it and that will leave me with two spare DRL lights incase one breaks or gets smashed.
Any guesses at what I'd find if I broke the ECU box open ? If it's just connectors inside, then I could do this and sealed the unit up again !!
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Post by shcm on Aug 5, 2019 9:14:42 GMT
I assume these DRLs dim with headlights turned on?
If so, the least brain dead way (but maybe not the rock-bottom cheapest) of controlling the brightness is by something called PWM (Pulse width modulation).
The box may well be doing that and the flickering *may* go some way to suggesting a faulty PWM circuit in the box. (*I guarantee nothing, without actually observing the LED drive waveform).
I expect you'll find more than "connectors" in the box.
In this situation I don't see how WD40 is going to help much.
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Post by 152bobby on Aug 5, 2019 11:11:30 GMT
Yes they do dim when headlights turn on.
I think the best option (the one I didn't want to do) is just replace the lot with the new set I have.
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Deleted
Deleted Member
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Post by Deleted on Aug 11, 2019 21:31:57 GMT
Sorry but I just couldn't resist  |
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Post by 152bobby on Sept 10, 2019 13:15:44 GMT
Just to end this one, it was the little black sealed ECU box that was knackered.
Replaced it, intact replaced it with the wiring and all works fine.
I now have a spare set of the actual DRL lights, should one get broken.
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