[70ss427]

Merry Christmas! TO ALL.

Need either some help or a diagram??
I need to know what if anything I need to change as far as wiring is concerned when going from warning light dash to gauge dash, This is a 70 SS dash that as I have stated previously someone scabbed together. I ordered a new printed circut board, installed original SS gauges, and I am ready to reinstall dash into car. The wiring diagram I rec'd from a so called restor shop, does not give me the dash cluster wiring info that I need.

Ay help now would be appreicated.

Jack

1970 Chevelle SS 427/4spd

"Spread Joy, and Good Cheer"

 

[webfoot]

Oops not the link I thought it was.

 

[Elree Colby]

This is a 70-72 full gauge cluster connector pinout. Move/add wires as described when replacing a light cluster with a gauge cluster.

 

[70ss427]

Thank You. I hooked up the dash this AM just to see what would and wouldn't light up, when I turned on the headlights they came on!! but then I turned the reostat all the way the dash lights came on???? Anyway I will keep plugging along here, This diagram helps, I need to hook up some grds that I have hanging, Were does the headlight grd strap grd to, this has a funny bent shape mounting piece??

Thanks again

 

[Steve S]

The headlight ground strap goes to the metal dash housing. Here is a link that might help with the wiring changes you need. http://www.azendrud.com/gauges/. Do not hook the gauges up nothing will work untill you make the changes in the link above. Might I suggest you do some testing before doing the full install.
You will need at least 4 amps of current from a 12v source.
You will need a 12 v source such as a battery (fuse the pos lead), battery charger or power supply. It is easier if you have a mating connector for the gauge cluster but not necessary. Connect + (12v) to pin 7 (gauge power) or any of the terminals that pin 7 connects to (follow the traces from pin 7) and - (neg) to any clean metal surface of the cluster. To test the dash lights connect another + (12v) wire to pin 2 (Dash lights). To test the oil light (no oil gauge for ss clusters) connect a ground (metal case)to pin 6. To test the turn signal lights connect another +12v to pin 1 for left and pin 12 for right. To test the fuel gauge, connect one end of a 45 ohm resistor to pin 11 and the other end to ground (metal case).
This should registor 1/2. If you don't have any resistors, no connection will be past full and ground will be empty. To test the temp gauge, connect a 75 ohm resistor from pin 10 to ground, this should registor about 210 deg. 50 ohm = 250 deg, 75 ohm = 210 deg and 270 ohm = 100 deg.If you don't have a resistor, open will register far left and ground on pin 10 will register past 250 deg. To test the brake light connect a ground to pin 8. To test the high beam light connect +12v to pin 5. To test the amp gauge connect a weak AA battery + on pin 3 and - on pin 4, it will registor over 40 amps charge (depending on condition of battery), reverse the AA battery and it will register over 40 amps discharge. If AA battery is new it might flip the neddle to 6 o'clock, just touch again and it should flip back. To test the tach you will need a pulse generator or a running car that has points or early (no computer) hei ignition. Hook the + from the car battery to pin 7 and - from the car battery to any clean metal surface of the gauge cluster. Hook the negative side of the coil (points ign) or tach terminal(hei ign) to pin 9. start car up and rev motor, tach should respond.

 

[70ss427]

Thank you Steve this is what I have been looking for.

Thanks for the Christmas present.

This should make it alot easier. Your description above is very intense, I am of old school, using a grd light and pwr source for the correct read, sounds like you are more "techno" guy then me..
I assume by your above statement, that I am checking each gauge to make sure it's working properly??

Anyway enjoy your Christmas and New Year.

 

[Steve S]

Your very welcome. Yes you are checking each gauge and each light to make sure it works.
I hope you and everyone here at team chevelle has a very merry christmas and chevelle new year!