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Technique to change an A-body high beam bulb?

Posted By: AtomicDog

Technique to change an A-body high beam bulb? - 06/09/16 08:50 AM

I'm doing some work on a 1973 Duster and noticed that the high beam indicator light does not come on when the high beams are turned on via the floor switch. I suspect the bulb is burned out in the dash. Unfortunately, I have somewhat larger hands and can't easily get to the bulb with my hand to twist it out of the cluster to change it. Does anyone have a technique they can share to get to this bulb to change it?
Posted By: 69L78Nova

Re: Technique to change an A-body high beam bulb? - 06/09/16 12:58 PM

Just drop the column and roll the cluster out. You can have it in your hands in about 15 minutes. Check all of your other bulbs while its out
Posted By: Supercuda

Re: Technique to change an A-body high beam bulb? - 06/09/16 01:35 PM

May as well buy some new bulb sockets too, because they tend to break when the get old.
Posted By: RapidRobert

Re: Technique to change an A-body high beam bulb? - 06/09/16 05:19 PM

drape a rag across the top of the column to protect the paint from the dash. pull a batt cable off of its post before starting. You might jump fire to the wire to confirm it is the bulb/socket before you go to the trouble but yes (highly) likely it is the bulb
Posted By: Supercuda

Re: Technique to change an A-body high beam bulb? - 06/09/16 07:23 PM

May as well just replace all the bulbs in the cluster rather than keep doing this as they burn out.

Bulb socket part number STANDARD MOTOR PRODUCTS S503A rockauto has them, Dorman also makes them in their Help! line but I don;t know that number.
Posted By: AtomicDog

Re: Technique to change an A-body high beam bulb? - 06/10/16 04:04 AM

Thanks for the ideas folks. Just noticed that while I had my hand behind the dash to change a couple of the bulbs, I just noticed that the fuel gauge and temp gauge both stopped registering while the car is running. Any idea what I hit back there to cause this condition?
Posted By: Supercuda

Re: Technique to change an A-body high beam bulb? - 06/10/16 04:12 AM

the IVR, instrument voltage regulator.

http://www.rockauto.com/en/moreinfo.php?pk=44056&cc=1088603&jsn=417

Or the round connector isn't seated.
Posted By: Rhinodart

Re: Technique to change an A-body high beam bulb? - 06/10/16 04:13 AM

You have to be very careful back there as there is a connector that plugs into several pins that can shear off easily. Look at the picture of the IP on the top right. You can see where the light bulbs twist in also. I always recommend disconnecting the plug before lowering the steering column and twisting the IP down so you can be very careful about hitting the pins on the dash. twocents

Attached picture dart ip.jpg
Posted By: AtomicDog

Re: Technique to change an A-body high beam bulb? - 06/10/16 04:24 AM

Thanks for that photo. I did have to lower the steering column on the car, as I recently changed the steering gearbox. I'll check those spots.
Posted By: Rhinodart

Re: Technique to change an A-body high beam bulb? - 06/10/16 01:48 PM

The picture I posted was for a 67-70 IP, here is one for a 72-76 standard IP. The pin arrangement was changed to a round style but can still be damaged if not careful. wave

Attached picture 72 dart ip.JPG
Posted By: RapidRobert

Re: Technique to change an A-body high beam bulb? - 06/10/16 06:24 PM

What Rhino said, if the round pin connector has to come off, gently pry it up & off of the pins EVENLY on both sides, you do not want to break a pin
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