Relay | My Black Brick

My Black Brick

Keeping a '92 Volvo 240 Wagon on the Road & Other Automotive & DIY Musings

Overdrive Relay Check

Below is a sketch documenting how I checked the over-drive relay after I lost the use of over-drive last winter. It follows a technique I’d seen posted on the Brick Board, probably by Dave Barton. It took a while to troubleshoot but I eventually sucked it up and got the $40 Over-drive Solenoid Bypass kit from IPD and it’s worked great since then.

UPDATE: Added photo of the bypass kit install at bottom of this post.



Troubleshooting Overdrive


Finally pulled the glovebox out and checked the Overdrive Relay switch. It looks fine but, after trying Art Benstein’s test of the current at the relay, it didn’t give a response. I’ve read that the circuit boards often need to be resoldered, so I’m thinking I need to bust it open and check, before springing $43 for the part.