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Topic: REV Counter Stopped Working (Read 1175 times) |
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hughiemc
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REV Counter Stopped Working
« on: Jan 29th, 2008, 5:46pm » |
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Hi all, after fitting a new (2nd hand) alternator i just took my 12v Ultima for a spin and noticed the rev counter was a bit 'twitchy' then it stopped working all together. Anyone got any ideas?
cheers
Hughiemc
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Mottsy
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Re: REV Counter Stopped Working
« Reply #1 on: Jan 29th, 2008, 6:26pm » |
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When I first got mine the rev counter was twitchy.
It was repaired on warranty but I think it was the alternator bushes or diodes.
Hopefully someone more knowlegable will be along to help shortly.
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Jonnycab
Senior Member
Former owner of 2.3 Ultima Facelift saloon
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Re: REV Counter Stopped Working
« Reply #2 on: Jan 30th, 2008, 2:34am » |
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The rev counter works from the alternator 
If it was fine before, then you'd have to assume that the second hand alternator is faulty
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ricky
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Re: REV Counter Stopped Working
« Reply #3 on: Feb 28th, 2008, 4:22pm » |
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hi jonnycab, i see on a post you have said that the rev counter on the 12v is fed by the alternator is this correct as mine wont work either cheers ricky
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Snoopy
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Re: REV Counter Stopped Working
« Reply #4 on: Feb 28th, 2008, 5:42pm » |
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Rev counter on the 12 v takes the pulse from the coil AFAIK.
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ricky
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Re: REV Counter Stopped Working
« Reply #5 on: Feb 28th, 2008, 5:47pm » |
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thanks snoopy, thought so but was grasping for the old straw, will make a donation soon , ricky
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Snoopy
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Re: REV Counter Stopped Working
« Reply #6 on: Feb 28th, 2008, 5:51pm » |
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Well as far as I know it does but look to the wiring diagrams for confirmation ..... ! WIRING
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Jonnycab
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Former owner of 2.3 Ultima Facelift saloon
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Re: REV Counter Stopped Working
« Reply #7 on: Feb 29th, 2008, 2:54am » |
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What ?...the rev counter on the 12V works from the coil & not the alternator 
Surely then, if the rev counter doesn't work, then the coil must be kaput....& if the coil is kaput, then the ignition can't work properly & the engine wouldn't be running very well
Please correct me if I'm wrong 
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Snoopy
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Re: REV Counter Stopped Working
« Reply #8 on: Feb 29th, 2008, 8:16am » |
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NO JC it does not work as simply as that !
The coil can be OK but the pulses are the thing that matters and if the pulse counter fails then the rev counter fails...
ECU any way so its most likely the pulse counter has failed .
Newer cars do take the pulses from the alternator, BUT AFAIK the old 12 still uses the coil as the source of the pulse.
See HERE
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Octavian_P
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Re: REV Counter Stopped Working
« Reply #9 on: Feb 29th, 2008, 11:59am » |
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The 2.5 TD uses the alternator for the rev counter as it doesn't have spark plugs / coils
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2.0 16V Ultima|2.3 16V Ghia|2.9 24V Cosworth Ghia
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Jonnycab
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Former owner of 2.3 Ultima Facelift saloon
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Re: REV Counter Stopped Working
« Reply #10 on: Feb 29th, 2008, 12:29pm » |
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Looks like I was wrong then  .....sorry
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hughiemc
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Re: REV Counter Stopped Working
« Reply #11 on: Feb 29th, 2008, 6:48pm » |
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Hi all sorry for the TARDY reply, the single wire had popped off the alternator where the rev counter gets its feed from. I was going to sell her once repaired but I realised she is too nice to let go lol.
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Jonnycab
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Former owner of 2.3 Ultima Facelift saloon
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Re: REV Counter Stopped Working
« Reply #12 on: Mar 1st, 2008, 1:11am » |
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on Feb 29th, 2008, 12:29pm, jonnycab wrote:| Looks like I was wrong then .....sorry |
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I'll take that back, thankyou very much 
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Snoopy
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Re: REV Counter Stopped Working
« Reply #13 on: Mar 1st, 2008, 7:59am » |
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It would appear that I am wrong on this one .. Sorry if I misled anyone !
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ricky
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Re: REV Counter Stopped Working
« Reply #14 on: Mar 1st, 2008, 1:30pm » |
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hi , thanks for the tremendous intrest and support from this site, all the answers and questions, i have sorted my rev counter out, on the 12v the rev counter is supplied from the alterater by the black and white, or white and black cable , it runs under the engine and up to a multiplug near the battery and this plugwas corroded, cleaned it and he presto working counter. it is only the stimulation from all the people on this site that makes it work, right or wrong it just makes you look for the answers witch in the cold light of day are always there , thanks ricky
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TiberiuS
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Ex. 1996 2.3 Ultima - RIP P789 KHJ
Posts: 2257
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Re: REV Counter Stopped Working
« Reply #15 on: Mar 1st, 2008, 8:50pm » |
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It's also worth soaking any connectors in switch cleaner and working them a few times, then packing them full of electrical grease like the stuff you can get from Maplin, it's an extra insurance against water getting in and leaving you stranded on the side of the M11 in the pouring rain . I do this on all my cars and even my trusty 13 year old Mondeo which gets used in all weather still seems free of any electrical problems (touches wood).
Glad you sorted it
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Bruce - '07 Jaguar XKR coupe, '95 Jaguar XJ Sport 4.0, '82 Ford Capri 2.0 Ghia, '15 Honda Civic (sloooooww..)
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hughiemc
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Re: REV Counter Stopped Working
« Reply #16 on: Mar 3rd, 2008, 8:45pm » |
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on Mar 1st, 2008, 1:30pm, ricky wrote:| hi , thanks for the tremendous intrest and support from this site, all the answers and questions, i have sorted my rev counter out, on the 12v the rev counter is supplied from the alterater by the black and white, or white and black cable , it runs under the engine and up to a multiplug near the battery and this plugwas corroded, cleaned it and he presto working counter. it is only the stimulation from all the people on this site that makes it work, right or wrong it just makes you look for the answers witch in the cold light of day are always there , thanks ricky |
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I totally agree, i just seen a thread about illuninated switch surrounds so guess what I will doing next few evenings!! This place has all the answers I am so glad I took by 2,9 Ultima 12v off e-bay!!
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