View Full Version : Oil pressure and Amp guages


rickmack
Mar 31st, 03, 09:50 AM
I am trying to hook up my cheap Summit Racing amp guage. It has two leads on the back, one says BAT the other says ALT. Where do I acutally run the 2 wires? Do I splice into existing wires off the alternator?

I am also trying to find a good place to hook up my Summit Racing oil pressure guage. The engine is in the car, so I can't tell if there is a hole near the distributor. Can I hook it up to one of the holes down by the oil pan? I don't know what's behind the allen bolts, but it would be easily accessable. What about down by the oil filter?
Thanks

John_Muha
Mar 31st, 03, 11:57 AM
The answer on your ammeter is that the ALT lead goes to the back of the alternator. One place to tie it is on to the horn relay + wire . The BAT lead normally goes to the junction block off the + terminal of the battery. This means you need to run wires down to the front of the car. Each lead MUST have a fusible link installed in it near the underhood connections. Without a fusible link, if a short occurs, everything could burn.
In my opinion, I wouldn't install a cheap ammeter. Get a voltmeter. Easier to install and a lot safer.

DjD
Mar 31st, 03, 01:07 PM
John's got you covered in the electrical dept Rick, as for the oil pressure - where is your existing oil pressure sensor for the warning light located? When you find it you'll find the easiest fitting to remove from the block and you can devise a "T" and run the guage and the warning light, or just disable the light by replacing the sensor with the guage hardware.

rickmack
Mar 31st, 03, 03:39 PM
My engine doesn't have a sending unit. If it was hooked up though, where would it be? Is it near the distributor, like on a small block?

DjD
Mar 31st, 03, 05:28 PM
Hey Rick - A '69 L35 (396/325) equipped with RPO U17 (Console Instruments) would have the oil line running from a fitting in the block by the oil filter. If the big block has a fitting by the dist it will be on the driver side of the block just behind the manifold.

rickmack
Mar 31st, 03, 07:16 PM
Thanks, I will check further.