What are the two pins on the ISC-BPA solenoid connector?

The diagram labels one terminal ISC (–) and the other VPWR (+).

Which pin on the ISC-BPA connector is power?

The pin labeled VPWR (+) is the positive power terminal; ISC (–) is the negative/control side.

Does the ISC-BPA solenoid have an internal diode?

Yes, the diagram shows a diode symbol drawn between the two connector terminals, indicating an internal diode across the solenoid.

What does this diagram show?

It shows a face view of the two-pin ISC-BPA solenoid connector with its terminal identifications: ISC (–) and VPWR (+).

Home/ Registry/ Ford/ Bronco/ 1987-1991/ “Eddie Bauer”/ Photo supermotors.net/registry/media/915292

Ford ISC-BPA Idle Air Bypass Solenoid Connector Pinout - ISC (–) & VPWR (+)

ISC-BPA solenoid circuit diagram showing internal diode with ISC and VPWR terminals

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Electrical circuit diagram of the ISC-BPA solenoid showing its internal diode and the ISC negative and VPWR positive terminals.

AI caption April 2012 · Photo 1274 of 1799

This document is a simple connector pinout diagram labeled "ISC-BPA" (Idle Speed Control - Bypass Air). It shows the face view of a two-pin electrical connector for the ISC-BPA solenoid, with the two terminals identified: one pin labeled "ISC (–)" (the idle speed control signal/ground side) and the other labeled "VPWR (+)" (vehicle power, the positive supply side). A diode symbol is drawn internally between the two terminals, indicating the solenoid contains an internal clamping diode across its coil. The diagram allows a reader to identify which connector cavity carries switched vehicle power and which carries the computer-controlled ISC signal, which is useful for testing the solenoid, back-probing the circuit, or diagnosing idle control problems. The document contains no year, model, engine, wire color, or part number information — it is purely a terminal identification drawing for the ISC-BPA (idle air bypass) solenoid connector. It was uploaded as part of an album of idle air control reference documents attributed to a 1990 Ford Bronco, and nothing in the diagram contradicts that application.

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Frequently asked questions

What are the two pins on the ISC-BPA solenoid connector?: The diagram labels one terminal ISC (–) and the other VPWR (+).
Which pin on the ISC-BPA connector is power?: The pin labeled VPWR (+) is the positive power terminal; ISC (–) is the negative/control side.
Does the ISC-BPA solenoid have an internal diode?: Yes, the diagram shows a diode symbol drawn between the two connector terminals, indicating an internal diode across the solenoid.
What does this diagram show?: It shows a face view of the two-pin ISC-BPA solenoid connector with its terminal identifications: ISC (–) and VPWR (+).