Unfortunately as part of the butchering that has been done to my HQ ute while in the hands of an unnamed shop the tachometer no longer works. Nor does a crapload of other electrical stuff such as ignition warning light etc etc. but I digress...
Do VDO use a consistent wiring colour coding so I can identify the various inputs and reconnect them? It's just a little steering column aftermarket one.
6 replies to this topic
#1
rexy
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Posted 16 August 2014 - 03:02 PM
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Posted 16 August 2014 - 03:30 PM
The two I've used have been brown signal wire and red/black for power/earth.
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hanra
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Posted 16 August 2014 - 08:54 PM
I would be inclined to find the cause of all the electrical problems as they all may be related.
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Posted 17 August 2014 - 11:37 AM
There is no obvious unifying cause to me on a look over. Have been fixing the myriad of problems they created one by one and hopefully as I progress through them a global solution will declare itself. At least it starts and drives now...
#6
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Posted 17 August 2014 - 03:19 PM
If the wires coming out of tacho are red/black/green/white.
Red=12v switched
Black=earth
White=back light in tacho..from dash lighting circuit
Green=negative on coil
#7
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Posted 17 August 2014 - 07:13 PM
You are correct. The green is the signal wire.
After a bit of rooting around under the dash I located the wire which was neatly snipped in two.
Sadly this was where the easy fix ended.
Stripped the ends, added a bridge to test, started the car and....no workee the tacho.
Bugger.
Must be wrong green wire.
Drop the steering column to get a better look at things. Always hesitant to do this in the oldies as seems easy to disturb things that have sat happily for 40 years.
No luck, it is the correct wire.
Assume damage also present elsewhere so buggerise around running a new feed wire from the distributor (coil in cap HEI).
Connect with bridge to test, start car and....no tacho.
Go to check bridge is clamping properly and get a good zapping for my trouble.
Remember at this point that gauges that have sat for a while are often sticky. Tap the tacho and she springs into action.
Test the original wire - of course it works.
So it works now but not without another humbling experience.
On to the rest of the problems....
After a bit of rooting around under the dash I located the wire which was neatly snipped in two.
Sadly this was where the easy fix ended.
Stripped the ends, added a bridge to test, started the car and....no workee the tacho.
Bugger.
Must be wrong green wire.
Drop the steering column to get a better look at things. Always hesitant to do this in the oldies as seems easy to disturb things that have sat happily for 40 years.
No luck, it is the correct wire.
Assume damage also present elsewhere so buggerise around running a new feed wire from the distributor (coil in cap HEI).
Connect with bridge to test, start car and....no tacho.
Go to check bridge is clamping properly and get a good zapping for my trouble.
Remember at this point that gauges that have sat for a while are often sticky. Tap the tacho and she springs into action.
Test the original wire - of course it works.
So it works now but not without another humbling experience.
On to the rest of the problems....
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