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Relay Circuit Board Removal, Installation, and Test
| 2. |
Relay Circuit Board - Remove |
| 3. |
All Removed Parts - Install |
| 1. |
Relay Circuit Board - Test |
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The relay circuit board is part of the under-hood fuse/relay box, and it contains these relay circuits: |
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Brake light relay circuit | |
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Ignition coil relay circuit | |
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PGM-FI main relay 1 circuit | |
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Starter cut relay 1 circuit | |
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Starter cut relay 2 circuit | |
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Make sure the correct test lead (?or ?) is placed on the terminal. | |
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When checking for continuity across the diode, use the diode setting (  ) on the digital volt/ohm meter to check the diode bias. | |
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Note this important operating characteristic; diode bias causes a diode to fully conduct electricity in one direction (forward), while not at all in the opposite direction (reverse). | | |
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Brake Light Relay Circuit
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Brake light relay circuit |
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There should be continuity between terminals C4 and A6, when 12 volt battery power is connected to terminal B2, and 12 volt battery ground is connected to terminal B1. | |
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There should be no continuity between terminals C4 and A6, and there should be continuity between terminals C5 and A6 when terminal B1 is disconnected. | |
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Ignition Coil Relay Circuit, PGM-FI Main Relay 1 Circuit, and PGM-FI Subrelay Circuit
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Ignition coil relay circuit |
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There should be battery voltage at terminal B6 when 12 volt battery power is connected to terminal C9, and 12 volt battery ground is connected to terminal A7. | |
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There should be no voltage at terminal B6 when terminal A7 is disconnected. | |
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PGM-FI main relay 1 circuit |
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There should be battery voltage at terminal C17 when 12 volt battery power is connected to terminal C18, and 12 volt battery ground is connected to terminal A7. | |
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There should be no voltage at terminal C17 when terminal A7 is disconnected. | |
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There should be battery voltage at terminal B3, C1 and C11 when 12 volt battery power is connected to terminal C14, and 12 volt battery ground is connected to terminal A3. | |
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There should be no voltage at terminal B3, C1 and C11 when terminal A3 is disconnected. | |
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There should be continuity between terminals A3 and C7. | |
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Starter Cut Relay 1 Circuit and Starter Cut Relay 2 Circuit
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Starter cut relay 1 circuit |
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There should be continuity between terminals A1 and A8, when 12 volt battery power is connected to terminal B4, and 12 volt battery ground is connected to terminal A5. | |
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There should be no continuity between terminals A1 and A8 when terminal A5 is disconnected. | |
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Starter cut relay 2 circuit |
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There should be continuity between terminals A2 and A8, when 12 volt battery power is connected to terminal B4, and 12 volt battery ground is connected to terminal A4. | |
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There should be no continuity between terminals A2 and A8 when terminal A4 is disconnected. | |
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There should be continuity between terminals C10 and A2. | |
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