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Time delay relay for lignition key. #2458942
02/28/18 04:21 PM
02/28/18 04:21 PM
Joined: Jan 2003
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Abilene, Texas
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fastmark Offline OP
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The relay that times the title light, key, etc is availed on eBay nos. But I was looking for a cheap source or even new technology timer that could be substituted. Any ideas?

Last edited by fastmark; 02/28/18 04:23 PM.
Re: Time delay relay for lignition key. [Re: fastmark] #2459026
02/28/18 07:24 PM
02/28/18 07:24 PM
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Chicago, IL
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PLUM_72 Offline
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While I am no electronics expert, I would imagine this "timer" is really nothing more than a capacitor. Stores energy while the circuit is powered and burns off the energy lighting the light when the power is off. Once the available energy in the capacitor is gone the light goes off.

Where the expertise is needed is sizing the capacitor to do what you want it to do.


1972 Dodge Challenger
Re: Time delay relay for lignition key. [Re: fastmark] #2459031
02/28/18 07:35 PM
02/28/18 07:35 PM
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Chicago, IL
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PLUM_72 Offline
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Last edited by PLUM_72; 02/28/18 07:39 PM.

1972 Dodge Challenger
Re: Time delay relay for lignition key. [Re: fastmark] #2459063
02/28/18 08:59 PM
02/28/18 08:59 PM
Joined: Feb 2012
Posts: 4,107
Morristown Tn.
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71birdJ68 Offline
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Morristown Tn.
It's just a capacitor, is something wrong with the one you have?

Re: Time delay relay for lignition key. [Re: fastmark] #2459076
02/28/18 09:35 PM
02/28/18 09:35 PM
Joined: Jan 2008
Posts: 374
Pittsburgh, PA
JS Restorations Offline
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Pittsburgh, PA
The original module from the factory did not use a capacitor at all. It was just a thermal driven device. Think of it as a one shot 552 turn signal module. Once the door would open creating a ground, the winding on one blade would heat up, flex toward the other blade, make contact and light the key light, map light, etc. Door shuts, blade cools down in thirty seconds or so pulls away and breaks contact. Bulbs turn off. Simple as that.







Jim

Re: Time delay relay for lignition key. [Re: fastmark] #2459098
02/28/18 10:18 PM
02/28/18 10:18 PM
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Abilene, Texas
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On mine, the post with the heating element and the insulation sock broke from of its weld.

Re: Time delay relay for lignition key. [Re: fastmark] #2459660
03/01/18 11:34 PM
03/01/18 11:34 PM
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Posts: 7,103
Harrisburg, Pa.
screamindriver Offline
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Harrisburg, Pa.
It was used in a wide range of vehicles from the 70s through the 80s including vans...I've got a whole bag of them from going to the boneyard..It's easier to simply replace it with another one and not worry about it for years to come...

Re: Time delay relay for lignition key. [Re: screamindriver] #2459838
03/02/18 11:08 AM
03/02/18 11:08 AM
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Abilene, Texas
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Originally Posted By screamindriver
It was used in a wide range of vehicles from the 70s through the 80s including vans...I've got a whole bag of them from going to the boneyard..It's easier to simply replace it with another one and not worry about it for years to come...


I just came to that conclusion. I pull a real nice one out of a low mileage 69 NYer from my parts car collection. Looks like I’ll hit the wrecking yard to see what’s left.

Re: Time delay relay for lignition key. [Re: fastmark] #2460249
03/03/18 12:06 AM
03/03/18 12:06 AM
Joined: Feb 2004
Posts: 7,103
Harrisburg, Pa.
screamindriver Offline
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Harrisburg, Pa.
Originally Posted By fastmark
Originally Posted By screamindriver
It was used in a wide range of vehicles from the 70s through the 80s including vans...I've got a whole bag of them from going to the boneyard..It's easier to simply replace it with another one and not worry about it for years to come...


I just came to that conclusion. I pull a real nice one out of a low mileage 69 NYer from my parts car collection. Looks like I’ll hit the wrecking yard to see what’s left.
IF you don't have any luck PM me and I'll pull one or two out for you from my lifetime supply...

Re: Time delay relay for lignition key. [Re: screamindriver] #2460393
03/03/18 10:58 AM
03/03/18 10:58 AM
Joined: Jan 2003
Posts: 4,841
Abilene, Texas
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fastmark Offline OP
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Abilene, Texas
Originally Posted By screamindriver
Originally Posted By fastmark
Originally Posted By screamindriver
It was used in a wide range of vehicles from the 70s through the 80s including vans...I've got a whole bag of them from going to the boneyard..It's easier to simply replace it with another one and not worry about it for years to come...


I just came to that conclusion. I pull a real nice one out of a low mileage 69 NYer from my parts car collection. Looks like I’ll hit the wrecking yard to see what’s left.
IF you don't have any luck PM me and I'll pull one or two out for you from my lifetime supply...


Thanks for the offer.. I found a couple of them on some junk wiring harnesses I have saved so this will get me out of my immediate spot. I need to go to the junk yard anyway for some other parts anyway.


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