Bentley From the original 3 Litre to the current Continental GT and Mulsanne

Total success for a change with such a small but massive win

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Old Mar 5, 2026 | 03:12 PM
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Total success for a change with such a small but massive win

So I had ordred a whole host of bulbs for the car to get them all refreshed, as I am fed up with bings and bongs with lights being out!! lol

Anyway got some interior boot bulbs today as missed them off the list of 14 bulbs, not sure how, anyway popped the bulb in and no joy.....and popped a little screwdriver in to nudge it and it lit up, so worked out some bad connector in the light socket, and mucked around with it....proper technical term.....and all worked a treat!!

After all my latest stuff I'll take the small win!! lol

Onward to the window regulators and door switches turning up this week hopefully or next week, but nicely got some new parts coming to fix the "bugs" but still not got the bottom of my parasitic drain....... don't want to put the new AGM battery in just yet until I get to the bottom of it.......just not sure if the earth strap in the boot or the KESSY or the Ground in the engine bay is the curprit....

Anyone know how to check the engine bay ground strap?

 
Old Mar 6, 2026 | 05:19 AM
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Originally Posted by CUE99T
Anyone know how to check the engine bay ground strap?
I would assume the cable itself is good. Just disconnect each end, give them a good clean with a wire brush, and reassemble with a bit of battery clamp grease.

If you really want to test the cable, you need to measure the voltage drop over it while under (significant) load. If you have an extra car battery lying around, take the ground strap off the car, bolt one end of it to a battery clamp on the extra battery, put a carbon pile load tester between the other end and the other terminal of the battery, crank up the load to something like 300 amps, and measure the voltage drop from one end of the ground strap to the other. You should see on the order of a few tenths of a volt drop. If you get a drop of multiple volts then the cable is bad.
 
Old Mar 6, 2026 | 01:15 PM
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Originally Posted by jeyjey
I would assume the cable itself is good. Just disconnect each end, give them a good clean with a wire brush, and reassemble with a bit of battery clamp grease.

If you really want to test the cable, you need to measure the voltage drop over it while under (significant) load. If you have an extra car battery lying around, take the ground strap off the car, bolt one end of it to a battery clamp on the extra battery, put a carbon pile load tester between the other end and the other terminal of the battery, crank up the load to something like 300 amps, and measure the voltage drop from one end of the ground strap to the other. You should see on the order of a few tenths of a volt drop. If you get a drop of multiple volts then the cable is bad.
Thanks man, but sounds probably a bit above my level of chekcing things..... I have a decent video I found of chekcing and sourcing the drain, but I have kinda fell at the first hurdle as I am not getting an y drain showin gon the Amps Multimeter using their technique which is bizarre, so I might just swap my new battery in now I have fixed the boot lid light as it might have been that. I am leaving the car for the 2nd night running off the battery charger so we will check whats the percentages showing on my Ancel BM200's tomorrow and see whats happening. It is cold here but I dont think thats drainign the battery as it was draining a bit of the old AGM I had, and I was tempted to pop that in first so not to destroy my new battery.

 
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