at 6:00 position my tach has a 3/8 hole in the face which i presume is an indicator light...what is that light in the tach for...have never seen mine light up so i dont even know if it works



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Rich
Cocoa Beach, Fla
Team Chevelle #380
46 but feeling like 20 when i'm in my 70 SS 454
wa3men@aol.com
www.chevelles.com/showroom/70_SS_454.jpg (http://www.chevelles.com/showroom/70_SS_454.jpg)

Are you sure your tach isn't where the clock would be in a non tach dash. Sounds like the hole is for a clock set knob to me. There were no lights in the tach.

Tom

speedo in middle
tach to left
clock to rt

3/8 hole w/ plastic lens (?? color...presume red) is in tach face plate at 6:00 position
about 1/4 inch from bottom edge of faceplate

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Rich
Cocoa Beach, Fla
Team Chevelle #380
46 but feeling like 20 when i'm in my 70 SS 454
wa3men@aol.com
www.chevelles.com/showroom/70_SS_454.jpg (http://www.chevelles.com/showroom/70_SS_454.jpg)

Do you know the history of the car. Could someone have rigged up a shift light to come on at a certain RPM ? Just a wild guess. Is the hole in the lens or in the tach face?

Tom

Maybe I'm barking up the wrong tree, but isn't that the OIL dummy light???

It's the oil pressure warning light.

It is the low oil pressure dummy light.

You guys are right. It's an oil pressure light. Just went out and uncovered one of mine and looked for myself! Never noticed it. I guess that's what happens when you look at em more than you drive em! Learn something new every day.

Rich, damn good thing you havn;t seen it light up!!!

well shouldnt it be ON then when i turn the igniton on before starting ie when theres no oil pressure??


when they installed an after market press guage is it likely they disconnected the sending unit form the wiring harness??

if so, where is the most likely place where i will find the "free" end and anyone know what color the wire is???

would the sending unit be different from the guage unit?? i presume it would be an on /off sending unit which they replaced with a gradient sensor for the gauge and just left the light disconnected...make sense??

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Rich
Cocoa Beach, Fla
Team Chevelle #380
46 but feeling like 20 when i'm in my 70 SS 454
wa3men@aol.com
www.chevelles.com/showroom/70_SS_454.jpg (http://www.chevelles.com/showroom/70_SS_454.jpg)

the oil pressure wire will be dark blue, 20G wire...trace back from the firewall engine harness (C shaped half of the bulkhead). looking at the diagram below with the "c" facing down, "o" is a a wire, "-" is a blank with no wire, and "X" is your oil pressure line. Trace it out and you will find where it is hidden..

o o o -
o o X -
- - o o
- o




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70 chevelle ss396 conv
66 chevelle ss396 hdp/conv
55 chevy prostreet
69/71 camaros

man...u guys r the BEST ...thanks

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Rich
Cocoa Beach, Fla
Team Chevelle #380
46 but feeling like 20 when i'm in my 70 SS 454
wa3men@aol.com
www.chevelles.com/showroom/70_SS_454.jpg (http://www.chevelles.com/showroom/70_SS_454.jpg)