1976 Tach Problems
Thread Starter
Le Mans Master
Joined: Apr 2005
Posts: 6,346
Likes: 418
From: Seattle Area WA
1976 Tach Problems
I just had all the gauges restored, installed the dash and the tach worked great, shut off the car and next time the tack spun around and stopped at 7K and when started went to 2,500 and stayed. What the heck, is this a new board that failed already?
Other issue is I turn on the lights and the left turn signal indicator bulb in the dash lights up so I guess I need to start looking for a short to that blue wire too. I pulled the relay but no luck.
Other issue is I turn on the lights and the left turn signal indicator bulb in the dash lights up so I guess I need to start looking for a short to that blue wire too. I pulled the relay but no luck.
Last edited by Scott Marzahl; Jun 13, 2010 at 01:26 AM.
Thread Starter
Le Mans Master
Joined: Apr 2005
Posts: 6,346
Likes: 418
From: Seattle Area WA
Thanks Roger, between a new flasher and cleaning that ground to the driver's front bulb took care of it, now to figure out that tach problem.
I also just discovered that the headlight switch will not power the dash or console bulbs and I have good grounds. I need to install a couple headlights and see if they light up or not as well. Can these headlight switches fail just a portion of the contacts?
I also just discovered that the headlight switch will not power the dash or console bulbs and I have good grounds. I need to install a couple headlights and see if they light up or not as well. Can these headlight switches fail just a portion of the contacts?
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Your Welcome.
Check the INST lamp fuse to see if either side of it is hot when the HL switch is pulled.
The fuse is actually fed "from" the HL switch and then from there goes to the dash lights.
Yes portions of the HLS can fail , the usual failure is the dash light portion.
Check the INST lamp fuse to see if either side of it is hot when the HL switch is pulled.
The fuse is actually fed "from" the HL switch and then from there goes to the dash lights.
Yes portions of the HLS can fail , the usual failure is the dash light portion.
Thread Starter
Le Mans Master
Joined: Apr 2005
Posts: 6,346
Likes: 418
From: Seattle Area WA
Tach update
Well after a day of screwing around trying to figure out what could be wrong with the rebuilt tach I took a close look at the new tach board and found a lose spade terminal. I hooked it up to the car's harness and with every wiggle the tach would either work or go haywire. I resoldered that terminal and so far so good.
Thanks again Roger, I had a faulty INST light fuse, you couldn't see it but when I checked it with a meter as suggested, no power. Replaced the fuse and I've got dash and center cluster lights. Getting this thing wrung out one step at a time.
Now to get the horns to work and I've got a new horn contact installed and verifed a good ground as well, with my luck the new contact will be bad or something else in the column.
Thanks again Roger, I had a faulty INST light fuse, you couldn't see it but when I checked it with a meter as suggested, no power. Replaced the fuse and I've got dash and center cluster lights. Getting this thing wrung out one step at a time.
Now to get the horns to work and I've got a new horn contact installed and verifed a good ground as well, with my luck the new contact will be bad or something else in the column.
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
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