Electrical Module identification

handymancanfixit

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Apr 10, 2025

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Winston Salem, NC

Jun 9, 2025

#1

• Jun 9, 2025

• #1

Can someone tell me what these two modules are? 1984 GT 5.0 5-speed

 

Last edited: Jun 9, 2025

85GTStangGuy

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#2

• Jun 9, 2025

• #2

What year car is this? Is it an 84 or 85? Is it (or was it) a manual tranny car?

The first pic is your barometric sensor. It is part of the circuit that adjusts the fuel mixture when the car is driven at higher altitudes.

Depending on the year of your car, the second pic may be part of the "upshift light" circuit.

 

handymancanfixit

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Winston Salem, NC

Jun 9, 2025

#3

• Jun 9, 2025

• #3

85GTStangGuy said:

What year car is this? Is it an 84 or 85? Is it (or was it) a manual tranny car?

The first pic is your barometric sensor. It is part of the circuit that adjusts the fuel mixture when the car is driven at higher altitudes.

Depending on the year of your car, the second pic may be part of the "upshift light" circuit.

Click to expand...

Sorry, forgot to post that. 1984 GT 5.0 5-speed

 

85GTStangGuy

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#4

• Jun 9, 2025

• #4

Being an '84 with a stick, I believe my previous post to be correct.

 

handymancanfixit

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Winston Salem, NC

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#5

• Jun 9, 2025

• #5

85GTStangGuy said:

Being an '84 with a stick, I believe my previous post to be correct.

Click to expand...

A barometric sensor on a carbureted engine?

 

handymancanfixit

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#6

• Jun 9, 2025

• #6

Any other suggestions as to what these two modules could be?

 

handymancanfixit

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#7

• Jun 9, 2025

• #7

This one is a barometric pressure sensor that seems to be communicating with the ignition system.

 

handymancanfixit

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Apr 10, 2025

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Winston Salem, NC

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#8

• Jun 9, 2025

• #8

Still not sure what this one is.

 

gkomo

now i can hopefully expect to receive the shaft

Aug 2, 2024

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#9

• Jun 9, 2025

• #9

Distributor modulator? That’s what comes up googling that P/N?

 

85GTStangGuy

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#10

• Jun 10, 2025

• #10

handymancanfixit said:

Still not sure what this one is.

Click to expand...

85GTStangGuy said:

Depending on the year of your car, the second pic may be IS part of the "upshift light" circuit.

Click to expand...

 

handymancanfixit

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Apr 10, 2025

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Winston Salem, NC

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#11

• Jun 10, 2025

• #11

I called my local dealership parts counter and Ford says that this is a "Distributor Modulator Valve Switch". I checked the vacuum/electrical schematics and I can't find it shown anywhere. The "shift indicator light" on the electrical schematics shows as getting its signal from the tachometer.

Anyway, my goal is to get rid of as many of these underhood smog/vacuum/etc. switches and clean up the wiring harness. I am installing a Holley Sniper 2 system with a Hyperspark distributor, coil and ignition module. The only vacuum connections that I want to keep are the brake booster, A/C, and cruise control (which I don't know if it works or not)