I Hate Wires!!
Thread Starter
Instructor
Joined: Feb 2006
Posts: 185
Likes: 2
From: Long Valley NJ
I Hate Wires!!
First, sorry for the long post, but my eyes are getting cross-eyed with these wiring diagrams. 
I finished pulling the old harness from my 70 today. Now I want to replace the old guages with Phantom guages from Autometer.
1. Fuel Temp Guage: The standard guage has the sender wire and the 12V wire. The autometer guage has both those wire terminals plus a ground post. What am I missing? How was the fuel guage originally grounded?
2. Water Temp Guage: This seems to make sense. The original guage has the sender, 12V, and ground. The autometer has the same. I think I can simply tap the right lines and done.
3. Console Lights: Since the new guages have their own plug in lights with a 12V and ground connection, can I run the car without bulbs in the console lights? Also, and imortantly, are these grey single wires 12V? Can I tap for the positive terminal?
4. Ammeter: I want to use a Voltmeter in place of the Ammeter. What do I do with the B and B/W wires?
Any help would save my sanity!!
I finished pulling the old harness from my 70 today. Now I want to replace the old guages with Phantom guages from Autometer.
1. Fuel Temp Guage: The standard guage has the sender wire and the 12V wire. The autometer guage has both those wire terminals plus a ground post. What am I missing? How was the fuel guage originally grounded?
2. Water Temp Guage: This seems to make sense. The original guage has the sender, 12V, and ground. The autometer has the same. I think I can simply tap the right lines and done.
3. Console Lights: Since the new guages have their own plug in lights with a 12V and ground connection, can I run the car without bulbs in the console lights? Also, and imortantly, are these grey single wires 12V? Can I tap for the positive terminal?
4. Ammeter: I want to use a Voltmeter in place of the Ammeter. What do I do with the B and B/W wires?
Any help would save my sanity!!
Drifting
Joined: Dec 2004
Posts: 1,345
Likes: 3
1. The fuel gage functions by varying the ground resistance THROUGH the sender wiring.
3. You can run the console without bulbs with no problems as long the wires in the lighting bulb sockets don't ground out, either behind the console OR drift inward to ground inside the console.
4. For the voltmeter, all you need to do is take any switched 12V wire and any gound.
3. You can run the console without bulbs with no problems as long the wires in the lighting bulb sockets don't ground out, either behind the console OR drift inward to ground inside the console.
4. For the voltmeter, all you need to do is take any switched 12V wire and any gound.
Melting Slicks
Joined: Dec 2005
Posts: 2,441
Likes: 0
1. Fuel Temp Guage: The standard guage has the sender wire and the 12V wire. The autometer guage has both those wire terminals plus a ground post. What am I missing? How was the fuel guage originally grounded? Gauge need frame ground to work properly.
2. Water Temp Guage: This seems to make sense. The original guage has the sender, 12V, and ground. The autometer has the same. I think I can simply tap the right lines and done. That's right, the green is the sender wire.
3. Console Lights: Since the new guages have their own plug in lights with a 12V and ground connection, can I run the car without bulbs in the console lights? Also, and imortantly, are these grey single wires 12V? Can I tap for the positive terminal? Yes. Yes they are 12v, depends on how big a draw you be getting from them. These are the instrument lights and fused from the fuse block with a low amperage fuse.
4. Ammeter: I want to use a Voltmeter in place of the Ammeter. What do I do with the B and B/W wires? Tape them up out of the way.
As far as grounding goes, just connect all the gauge's grounds together and connect to frame ground.
2. Water Temp Guage: This seems to make sense. The original guage has the sender, 12V, and ground. The autometer has the same. I think I can simply tap the right lines and done. That's right, the green is the sender wire.
3. Console Lights: Since the new guages have their own plug in lights with a 12V and ground connection, can I run the car without bulbs in the console lights? Also, and imortantly, are these grey single wires 12V? Can I tap for the positive terminal? Yes. Yes they are 12v, depends on how big a draw you be getting from them. These are the instrument lights and fused from the fuse block with a low amperage fuse.
4. Ammeter: I want to use a Voltmeter in place of the Ammeter. What do I do with the B and B/W wires? Tape them up out of the way.
As far as grounding goes, just connect all the gauge's grounds together and connect to frame ground.
Le Mans Master
Joined: Jan 2006
Posts: 9,192
Likes: 27
From: Boca Raton Florida
