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Author Topic: So what's this plug do?  (Read 1839 times)

attkrlufy

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So what's this plug do?
« on: February 16, 2011, 04:55:28 PM »

Today I was cleaning up the engine bay in my '79 New Yorker (360 v8) and I found an unplugged plug.  I have no idea what it's for and I can't find it in my Service Manual.  It's got a part # on it's side (3513624) but I checked my '79 Parts Catalog and that # isn't listed.  It's buried in with the wires that run through the conduit right next to the cruise control assembly - perhaps it's part of that?  My CC isn't currently working.....maybe it's related to that?

Just thought I'd try a longshot and see if any of you guys here know what this plugs into and what it's for.  You can see it located between the CC servo and the diagnostic port for the lean burn computer:




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1979 New Yorker - 360 4v, 2.71:1 rear, factory moonroof, factory road wheels


Brian

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So what's this plug do?
« Reply #1 on: February 16, 2011, 06:09:08 PM »

The black/brown wire with the socket type boot?  Well that goes down to the stud off the top of your proportioning valve....brake warning light.




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Brian

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Steve

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So what's this plug do?
« Reply #2 on: February 16, 2011, 07:00:46 PM »

Didn't this car have lean burn in it?  I had an 80 that didn't have it
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So what's this plug do?
« Reply #3 on: February 16, 2011, 07:01:24 PM »

That makes sense, but  the question is, WHAT THE HECK IS IT DOING ALL THE WAY UP THERE?
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attkrlufy

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So what's this plug do?
« Reply #4 on: February 16, 2011, 07:01:53 PM »


Quote from: thrashingcows
The black/brown wire with the socket type boot?  Well that goes down to the stud off the top of your proportioning valve....brake warning light.
Oh that makes sense.  On my portioning valve there's four threaded openings but only three tubes coming out of it.  The fourth has a cap with a little "nub" on the end.  I guess that boot fits over top of it.

Thanks.  :)

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1979 New Yorker - 360 4v, 2.71:1 rear, factory moonroof, factory road wheels


attkrlufy

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So what's this plug do?
« Reply #5 on: February 16, 2011, 07:04:03 PM »


Quote from: dana44
That makes sense, but  the question is, WHAT THE HECK IS IT DOING ALL THE WAY UP THERE?
I have no idea.  Maybe someone did brake work on Wanda in the past and forgot to plug it back in.

Is it a connection I should use dielectric grease on or does it "sense" brake pressure some other way?

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1979 New Yorker - 360 4v, 2.71:1 rear, factory moonroof, factory road wheels


Steve

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So what's this plug do?
« Reply #6 on: February 16, 2011, 08:12:09 PM »

Hah
I was looking at the srong plug.  Yup, I agree.  It looks like the plug that goes to the prop valve for the brake warning light
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attkrlufy

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So what's this plug do?
« Reply #7 on: February 17, 2011, 11:55:04 AM »

Yep, it is.  Cleaned and greased the sensor and cap and popped it on this afternoon.  Glad that's back in place.  I'm lucky nothing went wrong with my brakes while it was off.  

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1979 New Yorker - 360 4v, 2.71:1 rear, factory moonroof, factory road wheels


Snotty

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So what's this plug do?
« Reply #8 on: February 17, 2011, 01:58:41 PM »

If your brake waring light starts coming on or pulsating, you might learn why it was disconnected in the first place.  The valve that plugs into indicates a warnign light if the pressures in the valle drop too low.  That light can come on slightly on turns if your fluid pressure is low.
 
Even when disconnected your warning light should have still come on when you put on your parking breake - that's connected to a switch just above the E-brake pedal and is independent t teh one this plugs onto.
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Steve

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So what's this plug do?
« Reply #9 on: February 17, 2011, 04:56:14 PM »

If that light is flickering in turns and stuff like that, you have a problem and better tend to it.  It is not supposed to do that at all
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Snotty

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So what's this plug do?
« Reply #10 on: February 18, 2011, 09:57:32 AM »

Absolutely, but you know that people will put a piece of tape over their "Check Engine" light.  I could imagine there having been a problem and someone unpluged the sending unit wire.
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Tom Dawson

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So what's this plug do?
« Reply #11 on: February 18, 2011, 04:05:28 PM »


Quote from: Snotty
Absolutely, but you know that people will put a piece of tape over their "Check Engine" light.  I could imagine there having been a problem and someone unpluged the sending unit wire.

Speaking of check engine lights, when I was a mopar service advisor, a customer came in for state inspection and his bulb was removed by another dealer in WVU, talk about lazy, the Jeep had EVAP faults in the system, the other Dealer just did not want to fix it and it was customer pay work.


Tom

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Snotty

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So what's this plug do?
« Reply #12 on: February 19, 2011, 05:07:20 PM »

Had a car fail the smog check in Cali for a burned out bulb.  I had t take it back to the guy who did the previous trest two years earlier; he was fined for passing it since his notes said the bulb was out.
 
Sheesh!
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Corey

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So what's this plug do?
« Reply #13 on: February 19, 2011, 07:38:40 PM »



That plug may have been why the cruise wasn't working as well not sure how the older cruise systems work
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Snotty

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So what's this plug do?
« Reply #14 on: February 21, 2011, 09:50:48 AM »

Good thought Corey.  The system needs to know when the brakes are applied after all....  Hmmm....
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