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3 Arm Wiper Setup
Fix Motor Mount
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Throttle Body 65mm
Wheel Alignment
Heat Riser Replacement
Vent Window Repair
Center Console Mount
Straighten Bumper
Ford 6R80 6 spd
More Tech...
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Tach wiring help
- Thread starter donks&broncs
- Start date
BFPD630
Full Member
you got me on this one. did the sunpro instructions have a help line to call- of course I use the term 'help' loosely. Are you sure that you hit the panel light wire? You have an aftermarket harness installed by the PO, maybe he got creative and spliced extra lengths of wire or used incorrectly labeled wires? I am not sure why that would make the tach zero when the lights are on, that should be independent of the lights. The other option would be to get the tach's light power from the headlight power before the dimmer switch. I just purchased a new headlight switch and mapped the terminals, if you need me to I can tell you what terminals have power when- there are something like 8 different wires on that switch.
OP
OP
donks&broncs
Full Member
The wire I tapped into (labled dash lamps) has power only when the headlights or parking lights are on.
73stallion
Bronco Guru
i'd be calling sunpro, maybe you got a bad tach.
brixter
Sr. Member
I just installed an Auto meter tach and its funny you posted this thread . I have a centech harness as it sounds you do also . I dont have the extra dash lights on my 70 so I have extra dash light wires . I tried to use them on my tach and I couldnt get them to work either ( I think its because of the grounding circut you need to use with the later model dash lights ) anyway i just spliced into my speedohead dash lamps and it worked fine .
The funny thing is I didnt push the extra dash wire back up under the dash and when it touched a metal surface it caused my tach light to come on while I was driving around without the headlights on .
Try a different dash light wire .
The funny thing is I didnt push the extra dash wire back up under the dash and when it touched a metal surface it caused my tach light to come on while I was driving around without the headlights on .
Try a different dash light wire .
OP
OP
donks&broncs
Full Member
Yes it is a centec, and I tried a different wire. I want to blame it on a bad tach, but that is almost never the case. Generally, if you go that route, you just end up looking retarded.
SecondChance
Full Member
might check to be sure you have a good ground. Ground issues can really make things go funky sometimes.
OP
OP
donks&broncs
Full Member
If I checked anything, it was the ground. I have seen the ground make an experienced electrician look retarded. No ghost up that trail.
