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

Multimeter with ability to test continuity
(2) alligator clips
1416 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 multimeter prongs on no. 5 and no. 7 main relay
terminals
Listen for beep from multimeter, if beeps continue with test.
No beep replace main relay.
* 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 multimeter prongs on no. 1 and no. 3 main relay
terminals
Listen for beep from multimeter, if beeps continue with test.
No beep replace main relay.

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

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.