Car Fix DIY Videos

How to test and replace a Honda and/or Acura main relay!

Tool List:

Replace Main Relay

Remove and replace main relay

– 10mm wrench…all you need!

Test Main Relay

– Multi-meter with ability to test continuity
– (2) alligator clips
– 14-16 gauge female wire connectors. Remove plastic cover if one
is present

Testing Procedure:

1st Test – Battery (+) terminal connect to no. 6* main relay terminal
– Battery (-) terminal connect to no. 8 main relay terminal
– Place multi-meter prongs on no. 5 and no. 7 main relay
terminals
– Listen for beep from multi-meter, if beeps continue with test.
No beep replace multi-meter
* If your main relay does not have a no. 6 terminal, but rather a
no. 4 terminal, use the no. 4 terminal

2nd Test – Battery (+) terminal connect to no. 5 main relay terminal
– Battery (-) terminal connect to no. 2 main relay terminal
– Place multi-meter prongs on no. 1 and no. 3 main relay
terminals
– Listen for beep from multi-meter, if beeps continue with test.
No beep replace multi-meter

3rd Test – Battery (+) terminal connect to no. 3 main relay terminal
– Battery (-) terminal connect to no. 8 main relay terminal
– Place multi-meter prongs on no. 5 and no. 7 main relay
terminals
– Listen for beep from multi-meter, if beeps your main relay if
working properly. No beep replace multi-meter

Relay Diagram:

—————————————–
– 8 6 empty 2 –
– –
– –
– 7 5 3 1 –
—————————————–

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Disclaimer:
Due to factors beyond the control of Engineered Mojo, I cannot guarantee against improper use or unauthorized modifications of this information. Engineered Mojo assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. Engineered Mojo recommends safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of Engineered Mojo, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not Engineered Mojo.