Headlights flicker- relays chatter

[madkaw]

Need some help and direction. Headlights flicker sometimes over bumps. Found that if I tap on my relays with the lights on the lights flicker and the relays chatter. This is a 71 which I upgraded to relays . Oddly I have my fuel pump on a relay also and I can get it to chatter also by tapping it. Only thing I think they share in common is the power source. The main power comes from a power strip that I have connected directly to the back of the alternator . Pretty sure the grounds are different between the headlights and fuel pump. 

Appreciate any testing methods 

[Captain Obvious]

There is sometimes very little to be gained by simply looking at electrical stuff, but...

Can you take a couple pics of the parts in question anyway? The relays? The alternator?

[S30Driver]

Do both headlights consistently flicker at the same time or just one?

[madkaw]

I have each headlight on a separate relay, so good point whether they both flicker . It seems both do


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[madkaw]

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[madkaw]

The only common factor with all these is that they are grounded to the relay mount I made. Maybe insufficient for the power


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[sweatybetty]

check your ground for clean and tight. you might add some dielectric grease to stop corrosion too.

[madkaw]

Problem solved 99% sure. So I pulled the relays off the sockets to remove sockets and install new grounds. Then I noticed the trigger wires on the headlight relays about falling out of the sockets. These were part of a kit and I installed all the wiring. So I guess I didn't get the trigger wire pushed in until the spade catch caught on the socket. Pushing on my relays caused them to about fall off, so I was having a weak trigger signal . Must of been like this for years , but just now really started acting up. Now I can bang on the relays and nothing happens


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[Captain Obvious]

Excellent! Glad it was that simple.