Relays / Converting Polarity

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Converting Polarity:

• Negative Output to a Positive Output
• Positive Output to a Negative Output

Convert a Negative Output to a Positive Output

If you have a switch or an alarm or keyless entry that has a negative output that you wish to use to switch a device that requires 12V+ such as a horn, dome light, parking lights, head lights, hatch release, etc., wire a relay as shown below to convert the negative output (trigger) to a positive output. Convert a Negative Output to a Positive Output

Here's the same configuration showing a negative output from an alarm or remote keyless entry used to activate a trunk release solenoid that requires 12V+ to release the trunk. Convert a Negative Output to a Positive Output

Convert a Positive Output to a Negative Output

If you have a switch or an alarm or keyless entry that has a positive output that you wish to use to switch a device that requires a ground such as a horn, dome light, parking lights, head lights, hatch release, etc., wire a relay as shown below to convert the positive output (trigger) to a negative output. Convert a Positive Output to a Negative Output

Here's the same configuration showing a positive output from an alarm or remote keyless entry used to activate a vehicle's parking light relay that requires a ground to turn the lights on. Convert a Positive Output to a Negative Output

Relays and Relay Wiring Diagrams:
• SPDT and SPST Relays
• Converting Polarity
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• Illuminated Entry & Light Flash
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• Starter Interrupts
• Relay Diagrams - Quick Reference
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Mobile Electronics Basics:
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