My son & I are putting power door locks on his 72. we wired them up today & they do not work. Let me start at the begining. We mounted the relay, ran the wire harness, mounted the actuators,hooked up power & ground wires.
There is power to the relay but when I put the test light on the power wire that goes to the actuator, it just causes the relay to click.As long as the test light is touched to the power wire, the relay will click,The relay does not click until I touch it with the test light.As soon as I remove the test light it stops clicking.I thought it may be ground so I ran a ground wire straight to the neg. batt. post.(same results) I have double checked to make sure the harness is not shorting out anywhere. Any ideas?

Kinda sounds to me like the relay is wired backwards. The clicking of the relay should be controlled by wiring coming from the control switch, not the actuator.

When you put the light to the gorund side of the relay and it clicks it means you have a bad or no gorund.

There are several ways to wire a relay but I think in your case it should be as follows:

#30 should come from the battery or hot source and have a fuse close to the power source capable of running the door locks not at the relay.

The 87 goes to the door locks and the door locks have to have some type of ground coming back out of the door and attacheched to the body.

The 86 comes from the lock switch and should have a fuse before the switch.The fuse can be 7.5 to 10 amp because there is not much going on in this curcuit.

The 85 should go to ground.

The harness just plugs into the relay so I would assume it cannot be backwards.

it does sound like you do not have a ground at the right terminal look at your relay closely most of them will have a diagram on them and numbered terminals that will allow you to determine which terminals should be power or ground and which ones will actually go to the lock actuator.