electrical woes Options

[Mike1981]

Hello everyone

Hoping to get some electrical help on my 72

It has a V8 in it but will not pass any power

No buzzing of the fuelpump
No dash lights
No radio
no horn

nothing


I pulled the ignition switch and tested it

It was open until I turned the key and ohmed to almost 0 ohms
When I released it open circuit

Checked all wires in harness good

Ohmed out every fuse in the panel below dash as well as a few in the rear of the car.

Checked the ground strap (now a battery Cable)

At first I was not getting continuity between the tranny bolt and the body

Cleaned up the connection to the tranny as well as to the body ohms out to 2 ohms

Checked the battery 12.5 volts

Ohmed from neg terminal to chassis ground ohmed to 2-3 ohms

It was running fine yesterday until i turned on the headlights while staring it

then it died and I havent been able to get it to crank

Any help would be appreciated

thanks

MIke

[Spoke]

OK, sounds like the battery terminals are tight.

No voltage at the fuse panel? The first 3 fuses from the center of the car outward are constant 12V. If not 12V, then some wiring issue is at play.

How do the small wires look coming off the POS terminal? These wires go to the fuse panel.

Before you go behind the fuse panel, disconnect the battery NEG terminal. Do NOT move the fuse panel with battery connected.

Behind the fuse panel is a POS terminal block on the side of the chassis. Make sure this is tight.

With the fuse panel down, make sure no connections touch anything. Connect NEG terminal to battery. Test the positive terminal block behind the fuse panel from terminal block to chassis. Should be 12V.

[Mike1981]

OK, sounds like the battery terminals are tight.

No voltage at the fuse panel? The first 3 fuses from the center of the car outward are constant 12V. If not 12V, then some wiring issue is at play.

How do the small wires look coming off the POS terminal? These wires go to the fuse panel.

Before you go behind the fuse panel, disconnect the battery NEG terminal. Do NOT move the fuse panel with battery connected.

Behind the fuse panel is a POS terminal block on the side of the chassis. Make sure this is tight.

With the fuse panel down, make sure no connections touch anything. Connect NEG terminal to battery. Test the positive terminal block behind the fuse panel from terminal block to chassis. Should be 12V.

Thanks

I will re-check the smaller wires coming off the POS terminal at the battery.
I will then disconnect the NEG terminal and drop the fuse panel and make the check you recommend

thanks for your help.

Mike