Can You Identify This Under Dash Wire? - Ford Muscle Forums : Ford Muscle Cars Tech Forum
 
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post #1 of 9 (permalink) Old 05-15-2019, 02:20 PM Thread Starter
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Can You Identify This Under Dash Wire?

Can anyone identify this odd wire assembly under the dash on the left side of steering column. Wiring is certainly not my strong point.
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post #2 of 9 (permalink) Old 05-15-2019, 06:25 PM
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Re: Can You Identify This Under Dash Wire?

Those wires do look stock based on the ends. But that is kind of an odd arrangement. It could be that something else originally plugged into that connector. Like a switch. It's possible that it is related to an option that your car doesn't have, so the factory jumped it out. It seems kind of kludgy for the factory to do, so it's possible that someone replaced a switch and jumped across the terminals instead.

Do you have a wiring diagram? If so, you should be able to trace the wire colors and find that connector.

- John

Last edited by gearheadct; 05-15-2019 at 06:28 PM.
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post #3 of 9 (permalink) Old 05-15-2019, 07:17 PM
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Re: Can You Identify This Under Dash Wire?

looks like neutral start jumper, was car converted to stick from auto trans?
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post #4 of 9 (permalink) Old 05-15-2019, 07:39 PM
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Re: Can You Identify This Under Dash Wire?

Yes, neutral safety switch and Back up light connector for automatic column shift mounted switch.

If the car is a stick (looks like a clutch pedal there) the back up light switch will be on the floor shifter.

Stick cars did not have a neutral safety switch, but the harness was the same as automatic cars,
so the factory simply jumper the neutral switch.

Last edited by galaxiex; 05-15-2019 at 07:45 PM.
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post #5 of 9 (permalink) Old 05-15-2019, 08:07 PM Thread Starter
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Re: Can You Identify This Under Dash Wire?

Quote:
Originally Posted by moneypit64 View Post
looks like neutral start jumper, was car converted to stick from auto trans?
No. The Vin indicates that it is original build of 406 & 4 speed trans.

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post #6 of 9 (permalink) Old Yesterday, 07:41 AM Thread Starter
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Re: Can You Identify This Under Dash Wire?

Quote:
Originally Posted by galaxiex View Post
Yes, neutral safety switch and Back up light connector for automatic column shift mounted switch.

If the car is a stick (looks like a clutch pedal there) the back up light switch will be on the floor shifter.

Stick cars did not have a neutral safety switch, but the harness was the same as automatic cars,
so the factory simply jumper the neutral switch.
The reason I'm under the dash looking at wiring is I'm looking for a keyed wire to grab for my new Leed vacuum pump. Its a 10 amp draw.

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post #7 of 9 (permalink) Old Yesterday, 02:22 PM
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Re: Can You Identify This Under Dash Wire?

That's kind of a big draw. Best to use a relay, pulling power from the battery terminal of the solenoid. You could trigger it from the positive terminal of the coil. If you need to use a trigger source inside the car, the center, screw terminal of the ignition swich is hot when the key is on, but also in the ACC position if that's a problem.


Don't forget an inline fuse, maybe 15 or 20 A, preferably located close to the battery end of the wiring (to protect more of it).


Pat

1964 Galaxie 500 2 dr Fastback, 390, 4 speed, Indianapolis Indiana
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post #8 of 9 (permalink) Old Today, 08:21 AM Thread Starter
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Re: Can You Identify This Under Dash Wire?

Quote:
Originally Posted by 1964Fastback View Post
That's kind of a big draw. Best to use a relay, pulling power from the battery terminal of the solenoid. You could trigger it from the positive terminal of the coil. If you need to use a trigger source inside the car, the center, screw terminal of the ignition swich is hot when the key is on, but also in the ACC position if that's a problem.


Don't forget an inline fuse, maybe 15 or 20 A, preferably located close to the battery end of the wiring (to protect more of it).


Pat
Thank you Pat. --- I have already purchased this Blue Sea 4 circuit covered fuse block to hook into a strong keyed source for future accessory options. https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1 Your relay suggestion hooked to the battery positive of the solenoid could feed this fuse block to its max potential. Could you possibly post an Amazon link to a relay that would work for my situation. Automotive electrical is not my strong point. I ordered a 63 Galaxie wiring book to help me out, but it has not arrived yet. ---- So under the above scenario I would need to find just about any keyed wire source to trigger the relay, right?

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post #9 of 9 (permalink) Old Today, 02:04 PM
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Re: Can You Identify This Under Dash Wire?

Here's a link to one that has good reviews. Not very expensive but you have to buy two, so that's kind of annoying:


https://www.amazon.com/Ehdis-Relay-4...qid=1558125892


Here is a link that explains the pin numbering (about halfway down):


https://www.12voltplanet.co.uk/relay-guide.html


87 to the battery, 30 to the pump or fuse block, 86 to the line that's hot when the key is in run and 85 to ground.


I would say you need to find a line that's hot only with the key in the run position. You'd quickly drain your battery running the 10 amp pump if you left the key in the ACC position to listen to the radio, and the pump also ran in that position.


Pat

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