| Re: [GMCnet] Need help identifying this part? [message #326782 is a reply to message #326779] |
Tue, 05 December 2017 22:33   |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma:
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Senior Member |
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It is the Line Lock for rear parking brake, electrical switch.
On Tue, Dec 5, 2017 at 7:40 PM, Billy Massey wrote:
> It's not a line lock is it?
>
>
> On Dec 5, 2017 9:29 PM, "Matt Colie" wrote:
>
> GMC Jimmy wrote on Tue, 05 December 2017 22:01
>> Hello All, getting ready to install my Fitech and need to plumb a return
> line into the fuel filler neck and noticed this part... can you tell me
>> what it is?
>>
>> http://www.gmcmhphotos.com/photos/my-75-royale/p64083-image348.html
>>
>> Also, I will need to wire the fuel injection system, where did - would
> you tap into for an ignition source?
>>
>> Thanks for your help,
>> Regards,
>> Mike
>
>
> Mike,
>
> I actually recognize the part, but what it is doing there, I have no idea.
>
> I believe it is a proportioning regulator (c.1980). It was used before the
> burden (weight on the suspension) version became available in pickups and
> other light trucks. The top switch was actually a pressure sensing brake
> light switch and the lower one is part of a fault sensing circuit that I am
> having a hard time recalling the function of.
>
> Is it in the rear brake line?? Maybe I should have asked that first.
>
> I hate to admit that the LED recently installed over my head just came
> on......
> There is a decent bet that it was put in to try to stop the rear brake lock
> up.
> If it did work, in the case of a GMC all it would do is reduce total brake
> effectiveness.
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--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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