On my Ph.1 Gti-6 the rev counter broke on the way home when I bought it a couple of months ago. It isn't completely dead, it reads under the actual revs. For example, at idle it reads 0rpm and at max revs it reads 3k or 4k rpm. The oil pressure gauge on the rev counter also does not work, but it does work as the oil level before startup.

In addition to this, the remote central locking doesn't work (but it does work with the key). I'm led to believe that both of these can be caused by the loom down by the rad but it doesn't appear to be damaged, and I've reconnected all the plugs and WD40'd them etc. with no change. It could well be damaged but I can't see the damage.

When changing the icv a week or so ago, the rev counter did briefly work, I assume due to pulling the engine loom about, but it went away again very quickly.

The next thing I'm going to do is try cleaning up a few of the earths to see if this makes a difference.

I'd welcome any other suggestions that people may have. The only other electrical fault in the car is the electric wing mirrors not working if that also aids in diagnosing the problem.

Can anyone tell me which fuses might be involved if there's nothing else to try? Going to try cleaning up earths as well.

Thanks!

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61k miles Ph.1 Diablo '6 Project Thread

The contacts in the plug looked brand new to be honest!

The sheathing on it was intact and when I opened it the tightly-wrapped heat-shrink/tape stuff wasn't damaged at all. I supposed it could have snapped or corroded inside it by being pulled or something but without completely unwrapping all of the insulation I won't know.

Removed the paint under and cleaned up the earth in the driver's footwell, and put my good bosch S4 in. No difference. When I get a chance I'll do some of the ones that tend to cause the most issues in the engine bay and have another look.

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61k miles Ph.1 Diablo '6 Project Thread

Get hold of another cluster to eliminate this as the problem ?

I would try another cluster first. I know you said you want to keep the low mileage one, but you could at least try another to rule it out.

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"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone

Have you tried removing the cluster and then plugging it back in again?

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"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone

Apart from a broken leg

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Old pugs don't die they just get faster

Give it a go then and report back.

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"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone

Well, finally got around to getting some precision star point screwdrivers that fit in the holes and got this all off. Replugged in the plugs etc. Problem is still the same, oil level works but not pressure, and rev counter displays zero on idle and does increase but reads way under.

I'm still thinking it's a poor connection in the loom somewhere...

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61k miles Ph.1 Diablo '6 Project Thread

Thanks for the offer.
Given the symptoms I'm going to attempt to check over the loom again when I've got the time but will consider it.

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61k miles Ph.1 Diablo '6 Project Thread

Thanks, that might be good as a last resort, will only be 1-2 broken wires so hopefully they can be found!
Could I ask that you don't throw it away for a bit?

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61k miles Ph.1 Diablo '6 Project Thread

Just to bump this rather than creating a new thread: am I correct in assuming that the brown crank sensor on the gearbox is what measures engine speed?

I'm swapping engine looms, and the bumper is coming off to inspect the loom along that, but I'll also give the sensor some attention. I believe it's just bolted down, is it a case of just making sure it is correctly bolted down or can it be fitted with too large a gap? My rev counter is reading revs just it is reading very low so not getting a strong enough signal I'm guessing.

If all of this fails I'll get a new sensor.

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61k miles Ph.1 Diablo '6 Project Thread

I haven't tried a different cluster but I've unplugged it and reconnected it several times.
I will try a different one if none of this works. It seems like quite a lot of people have managed to find broken wires along the bottom of the bumper and have fixed it that way.

I think it's wiring as when changing the ICV ages ago it briefly came back as my friend was moving the loom around a bit.

Thanks for clarifying that.

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61k miles Ph.1 Diablo '6 Project Thread

It's not brilliant. It's all protected by fabric just wrapped around it as well.

It appears that someone has had a play with it before, as one section was covered in tape and all of the wires are covered in heatshrink which I'm going to assume isn't standard.

I couldn't see which was broken but it was dark so I'll have another look tomorrow. From memory the rev counter wire is supposed to be red but there are wires of different colours connected to eachother etc.

I haven't been able to find a wiring diagram for that loom yet, only the engine one. Any ideas where I might be able to get one?

As above though, it is reading revs, just massively under reading, so at idle it reads 0 and near the redline it is at abou 4000rpm or so, so a totally broken wire is unlikely.

Not the biggest fan of electric wizardry!

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61k miles Ph.1 Diablo '6 Project Thread