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Old 10-03-2010, 10:17 PM   #1
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86 firebird rear hatch lock

My rear hatch keyhole lock was messed up when I bought this car,i'm confused as to whether it is suposed to be a power pull down or mecanical lock.the button dosnt seam to be a functional one.just a filler.
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Old 10-03-2010, 11:07 PM   #2
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Re: 86 firebird rear hatch lock

The power trunk release was optional. You can look for A90 on the SPID. If it's just a gray block off plate the same color as the rest of the dash it's safe to assume it didn't come with the power release.

For some reason a messed up trunk lock is really common on the Pontiacs. It's not all that difficult to drill out the lock, chisel off the rivets, and replace the lock.
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Old 10-04-2010, 12:21 PM   #3
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Re: 86 firebird rear hatch lock

Mine was pretty bad, still worked, but barely. So I removed my tail light center section, drilled the 2 rivets and replaced the assembly with a new one. Only thing is now I have 2 "lock" keys, which isn't a big deal since I plan to keep the hatch key in the car. I tend to like to start the car and let it warm up while I take off the Ttops. You can't do that when the keys are in the ignition!
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Old 10-04-2010, 12:27 PM   #4
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Re: 86 firebird rear hatch lock

That's where a locksmith comes in... Take the locks to your smith and have him change the guts so they all work with matching keys. Maybe it's just because I've bought a lot of tow yard auction cars, or old junk, but it always seems like 2/3rds of the locks are always screwed. It costs under $50 to completely re-key a car with all new locks and keys.
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83 Camaro 5.0L *1995-98* RIP
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Old 10-04-2010, 06:47 PM   #5
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Re: 86 firebird rear hatch lock

A good idea, but for me this will work great... I am basically using a second "door" key that wouldnt be on my key ring, so it doesnt matter what the cut of the key is...
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Old 10-04-2010, 07:31 PM   #6
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Re: 86 firebird rear hatch lock

OK drilling it out and cut the rivits through the key hole or dose the trunk open after drilling
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Old 10-04-2010, 08:05 PM   #7
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Re: 86 firebird rear hatch lock

Once you drill about 1/2 way through the lock cylinder, you can usually pry the tumblers out and turn the lock with a screw driver to get the hatch open. Then you can remove the tail lights and the center panel so you can cut off the rivets and replace the lock.
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Old 10-05-2010, 12:57 PM   #8
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Re: 86 firebird rear hatch lock

Quote:
Originally Posted by Drew View Post
Once you drill about 1/2 way through the lock cylinder, you can usually pry the tumblers out and turn the lock with a screw driver to get the hatch open. Then you can remove the tail lights and the center panel so you can cut off the rivets and replace the lock.
Ditto
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Old 10-05-2010, 08:37 PM   #9
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Re: 86 firebird rear hatch lock

thanks guys,you have just made my day.think I can do that
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Old 05-09-2014, 02:02 PM   #10
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Re: 86 firebird rear hatch lock

i bought a 1984 trans am recently, and my hatch lock was also messed up. As I never worked on a lock before, I tried to open the lock from inside the car:
Crawling into the trunk, I was able to lift off the plastic housing from the bottom and get my arms underneath, by carefully probing for the hatch lock I found the connecting rod from the lock to the mechanism holding down the hatch. Then I used a screwdriver at some angle to apply pressure to the rod and thereby turning it, releasing the hatch.

As I want to switch to an electric lock assembly, I simply left the lock in place, removed the plastic cover for now and the little spring connecting the rod to the lock, so now I can turn the lock from inside the trunk (which is not very comfortable, but it works for now, and I didn't have to damage anything).
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Old 05-09-2014, 02:29 PM   #11
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Re: 86 firebird rear hatch lock

Quote:
Originally Posted by Bobby Suth View Post
My rear hatch keyhole lock was messed up when I bought this car,i'm confused as to whether it is supposed to be a power pull down or mechanical lock.the button dosn't seam to be a functional one.just a filler.
Hi Bobby,yes the rear hatch has a power pull down,standard on the 86 Firebirds.But as Drew said the release button on the dash remained an option.
I think I have a spare lock mechanism with the cable attached,I'll check.
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Old 05-09-2014, 04:34 PM   #12
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Re: 86 firebird rear hatch lock

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Originally Posted by mantaguy View Post
Hi Bobby,yes the rear hatch has a power pull down,standard on the 86 Firebirds.But as Drew said the release button on the dash remained an option.
I think I have a spare lock mechanism with the cable attached,I'll check.
Well, I revived a 4 year old thread. If he doesn't need it anymore, I would probably take it, as I'm just starting the process of fixing up the car.
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Old 05-09-2014, 04:34 PM
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