Operation CHARM: Car repair manuals for everyone.

Main Relay (Computer/Fuel System): Testing and Inspection

1. Disconnect negative cable at battery.

Main Relay:





2. Remove main relay from relay box.




Main Relay Resistance:





3. Check resistance between each two terminals as in image above. If check results are as specified, proceed to next operation check. If not, replace.





4. Check that there is continuity between terminals "A" and "B" when battery is connected to terminals "C" and "D". If found defective, replace.