Author Topic: black plastic box under drivers seat in a 74 ta  (Read 987 times)

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Offline 5150TA

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black plastic box under drivers seat in a 74 ta
« on: November 08, 2012, 12:21:33 PM »
found a box with some wires under my seat , anybody know what it's for , i have misplaced the box
« Last Edit: November 08, 2012, 05:50:42 PM by 5150TA »

Offline 78w72

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Re: black plastic box under drivers seat in a 74 ta
« Reply #1 on: November 08, 2012, 09:28:27 PM »
that is a seat belt- ignition interlock module.  disables the ignition if the seatbelt isnt engaged.
78 w72 ws6 4 speed
81 turbo pace car
lots of other past t/a's

Offline 5150TA

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Re: black plastic box under drivers seat in a 74 ta
« Reply #2 on: November 09, 2012, 08:54:36 AM »
will the car run without the box?

Offline TAKID455

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Re: black plastic box under drivers seat in a 74 ta
« Reply #3 on: November 09, 2012, 09:26:39 AM »
Yes. you may need to unplug the connectors under the dash to the right of steering column.
2nd Gen Engineering
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Offline 78w72

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Re: black plastic box under drivers seat in a 74 ta
« Reply #4 on: November 09, 2012, 10:06:57 AM »
Yes. you may need to unplug the connectors under the dash to the right of steering column.

actually im pretty sure the car wont run without it.  i just dealt with this in my 72 firebird prooject.  it was a base firebird without rally gauges, i decide to convert to rally gauges & used a 74 wire harness.  after studying the gm wiring diagram, i found that just unplugging the connectors won't do any good since it is just like the seat belt isn't clicked -- & therefore the car wont start.  i could be wrong but thats how it shows in the diagram.

if you need the box i would sell the one i have. 
78 w72 ws6 4 speed
81 turbo pace car
lots of other past t/a's

Offline 5150TA

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Re: black plastic box under drivers seat in a 74 ta
« Reply #5 on: November 09, 2012, 10:37:13 AM »
theres got to be a way to work around the box, dont you think.

Offline eroc022

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black plastic box under drivers seat in a 74 ta
« Reply #6 on: November 09, 2012, 02:14:10 PM »
Should be a simple grounding circuit, so find where the connection completes/switches and determine a way to jumper it
Eroc
Fixing the car that Restore A Muscle Car jacked up....

Offline TAKID455

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Re: black plastic box under drivers seat in a 74 ta
« Reply #7 on: November 09, 2012, 03:26:32 PM »
I have mine disconnected in my 74. no issues. There is a tech bulletin on how to disconnect the system.  I hooked it up by accident and no start. Quickly re-disconnected system.

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Offline 5150TA

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Re: black plastic box under drivers seat in a 74 ta
« Reply #8 on: November 09, 2012, 04:47:32 PM »
thanks for the info, probably be years before i  try to start it anyway,

Offline 78w72

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Re: black plastic box under drivers seat in a 74 ta
« Reply #9 on: November 09, 2012, 06:12:40 PM »
theres got to be a way to work around the box, dont you think.

yes you can by-pass it by just completing the circuit.  the diagram looked like  just unplugging the wires wouldn't do it.  worth a try though.
« Last Edit: November 09, 2012, 06:27:30 PM by 78w72 »
78 w72 ws6 4 speed
81 turbo pace car
lots of other past t/a's