Common causes of rev counter failure?
Common causes of rev counter failure?
Please let me know if im posting something I shouldnt, but the revcounter in the CX does not work, and there is a new one on ebay that ends very soon. Is it common for a revcounter to fail, or is it more likely to be a contact somewhere else? Im useless with wiring diagrams so cant work out what sends a signal to it.
Cheers, Adam
Cheers, Adam
- sleepy0905
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Its usually a signal from the ignition (Petrol) or a pickup from the flywheel (Diesel) the bx diesel pickup can fail causing the rev counter to not work but the petrol variant gets a pulse from the ignition so it would be worth checking the connections the guage itself is unlikely to fail but that is not saying they dont as they are usually prety bomb proof but I cannot give you exact info as i dont and never have owned a CX
2017 Seat Leon ST FR 2.0 150Bhp
- ken newbold
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On the petrol series one CXs it's as ellevie describes above. Usually it's caused by the wire getting hard just where it is attached to the spade terminal that connects to the coil and it breaks internally.ellevie wrote:On the 19TRS it's one of the four spade connectors on top of the ignition coil. It's the one which doesn't cut the engine out if you pull it off.
In 22 years of owning Cits, mainly CXs I've never heard of a tacho failing, so you'd have to be a bit stiff if yours has chucked it in. I'd be inclined to find the terminal, chop it off and fit a new one, clean up the terminal on the coil and see how it goes. A thorough checking of the wire if it still is no go might be worth the effort.
Alan S
By the time you're old enough to know it all, you can't remember why you were learning.
- thanuttiscotsman
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hi there,
if its a petrol engine then the signal comes from the ign coil. the is a 4 port connector that goes onto the coil and it is quit easy to figure which one it is!! one is power supply and is normally brown or yellow, one wire goes to a dead end where there is a normally black female connector, the third one comes from the ign module ( looks like a big computer chip and finally the only other one is the one your looking for. these thaco wires tend to break as they are too thin and usually break round about the bulkhead area. im sure that is your problem. oh yeah the other option is corrosion on the connectors again near the bulkhead.
cheers rossco
if its a petrol engine then the signal comes from the ign coil. the is a 4 port connector that goes onto the coil and it is quit easy to figure which one it is!! one is power supply and is normally brown or yellow, one wire goes to a dead end where there is a normally black female connector, the third one comes from the ign module ( looks like a big computer chip and finally the only other one is the one your looking for. these thaco wires tend to break as they are too thin and usually break round about the bulkhead area. im sure that is your problem. oh yeah the other option is corrosion on the connectors again near the bulkhead.
cheers rossco
1989 BX 16v ph1 Chipped, k+N, full scorpion, weber throttle body, NOS 1990 BX 16v ph2
1996 transit 2.5di 80 swb
2006 Suzuki GSR 600cc Fast as F**K!
1996 transit 2.5di 80 swb
2006 Suzuki GSR 600cc Fast as F**K!
Cheers for the tips guys. I did take the dash apart and removed the revcounter drum (bathroom scales type revcounter) I couldnt see anything obviously wrong, but I suppose its possible that a capacitor has died or something. Much more likely is that it is a connector in the engine bay somewhere. I have checked the wires on the coil (well, it was dark by this point so I just unplugged them then plugged them back in again. Ill check the whole length of wire for signs of cracking etc next weekend.
- thanuttiscotsman
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hi there,
dont waste all your time checking the whole length of wire it will take ages.m just take a 2 meter piece of wire connect on end to the coil and other to the tacho. if tacho works then install new wire if not then there is another problem.
rossco
dont waste all your time checking the whole length of wire it will take ages.m just take a 2 meter piece of wire connect on end to the coil and other to the tacho. if tacho works then install new wire if not then there is another problem.
rossco
1989 BX 16v ph1 Chipped, k+N, full scorpion, weber throttle body, NOS 1990 BX 16v ph2
1996 transit 2.5di 80 swb
2006 Suzuki GSR 600cc Fast as F**K!
1996 transit 2.5di 80 swb
2006 Suzuki GSR 600cc Fast as F**K!
It's a good suggestion but you have to be very careful & sure that you are connecting to the right points or................thanuttiscotsman wrote:hi there,
dont waste all your time checking the whole length of wire it will take ages.m just take a 2 meter piece of wire connect on end to the coil and other to the tacho. if tacho works then install new wire if not then there is another problem.
rossco
1991 BX19GTi Auto
- thanuttiscotsman
- BXpert
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hi there,
of course!!:D but i thought that was obvious! it will be easy to identify as it'll be right behind the tacho. there is a block 2 pin connector. connect your new wire to one of them if the tacho works cool if not try connecting the wire to the other pin in the connector if it still dont work then its another problem. dont worry about shorting it just do a simple test with testlamp first or a bot o wire wi a buld in middle.
rossco
of course!!:D but i thought that was obvious! it will be easy to identify as it'll be right behind the tacho. there is a block 2 pin connector. connect your new wire to one of them if the tacho works cool if not try connecting the wire to the other pin in the connector if it still dont work then its another problem. dont worry about shorting it just do a simple test with testlamp first or a bot o wire wi a buld in middle.
rossco
1989 BX 16v ph1 Chipped, k+N, full scorpion, weber throttle body, NOS 1990 BX 16v ph2
1996 transit 2.5di 80 swb
2006 Suzuki GSR 600cc Fast as F**K!
1996 transit 2.5di 80 swb
2006 Suzuki GSR 600cc Fast as F**K!
Good plan Rosco- The back of the revcounter is plastic, where two terminals emminate. The printed circuit board (that green flexible stuff) then joins on and goes straight to a connector with loads of connections on (but I can see where the revcounter ones end).
The way the bidding has gone on the one on ebay, I dont know whether thats a sign that they fail or a sign that people have got desperate like me:-)
http://cgi.ebay.co.uk/CITROEN-CX-TACHO- ... dZViewItem
The way the bidding has gone on the one on ebay, I dont know whether thats a sign that they fail or a sign that people have got desperate like me:-)
http://cgi.ebay.co.uk/CITROEN-CX-TACHO- ... dZViewItem
- thanuttiscotsman
- BXpert
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- Joined: Thu Oct 26, 2006 11:42 pm
hi there,
even if you need to replace the dash you can prolly get a scrappers one, may even give the milage a haircut and make you feel better about the car.
cheers rossco
even if you need to replace the dash you can prolly get a scrappers one, may even give the milage a haircut and make you feel better about the car.
cheers rossco
1989 BX 16v ph1 Chipped, k+N, full scorpion, weber throttle body, NOS 1990 BX 16v ph2
1996 transit 2.5di 80 swb
2006 Suzuki GSR 600cc Fast as F**K!
1996 transit 2.5di 80 swb
2006 Suzuki GSR 600cc Fast as F**K!