dog bone won't bite...
Thread Starter
Pro
Joined: Mar 2017
Posts: 569
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From: Durham NC
dog bone won't bite...
I have 12.5in. vac. at the relay, dog bone goes up but actuator just sits there like it's bored. If I bypass the relay and apply the vac hose(unhooked from the T jus before relays) to an actuator...they work.
Sooo, can the dog bone slide freely yet I still have a "bad" relay? The relays do hold vac on their own when bench tested(the small inlet at the top).
There must be a seal in the bone that is letting vac. slip by, no?
Sooo, can the dog bone slide freely yet I still have a "bad" relay? The relays do hold vac on their own when bench tested(the small inlet at the top).
There must be a seal in the bone that is letting vac. slip by, no?
Former Vendor
Joined: Aug 2006
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From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
I have 12.5in. vac. at the relay, dog bone goes up but actuator just sits there like it's bored. If I bypass the relay and apply the vac hose(unhooked from the T jus before relays) to an actuator...they work.
Sooo, can the dog bone slide freely yet I still have a "bad" relay? The relays do hold vac on their own when bench tested(the small inlet at the top).
There must be a seal in the bone that is letting vac. slip by, no?
Sooo, can the dog bone slide freely yet I still have a "bad" relay? The relays do hold vac on their own when bench tested(the small inlet at the top).
There must be a seal in the bone that is letting vac. slip by, no?
If you want to test the relay, you do it as shown in the first picture below, if you want to test the actuator you use the second picture.
Drifting
Joined: Jul 2006
Posts: 1,259
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From: Deplorableville Nebraska
Sooo, can the dog bone slide freely yet I still have a "bad" relay?
Original Gm relays can be rebuilt, the Chinese ones are basically disposable....
Thread Starter
Pro
Joined: Mar 2017
Posts: 569
Likes: 40
From: Durham NC
Your going to have to tell me what a dog bone is... as well as the year of the car. Are you talking about the headlamp relay clevis?
If you want to test the relay, you do it as shown in the first picture below, if you want to test the actuator you use the second picture.
If you want to test the relay, you do it as shown in the first picture below, if you want to test the actuator you use the second picture.
The diverter that moves inside the relay.
I sent you a pm couple days ago about purchasing electrical troubleshooting manual or CD......jus now checked your forum stats and now see a proper sales email source with which to contact.
Thank you.
Thread Starter
Pro
Joined: Mar 2017
Posts: 569
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From: Durham NC
In a word, yes. If you have old original GM AC SPARK relays that is a very common issue. The dog bone you refer to is the internal piston sliding up & down when vacuum is applied to the top control chamber. It is made of rubber and uses a lip seal design, very prone to leaking after a couple of decades or so. If you have the Chinese copy relay, anyone's guess. Many leaked right out of the box.
Original Gm relays can be rebuilt, the Chinese ones are basically disposable....
Original Gm relays can be rebuilt, the Chinese ones are basically disposable....
pm sent
