RickU

This seems like a silly question, but I'm working on my wife's 2006 RX330 and for the life of me can't find the horn relay. The horns have stopped working (they work fine when jumped) and the fuse tests out ok. There's a relay box underneath the brake fluid reservoir. The diagram on the underside of the lid says one of the relays is for the horn but there's no relay in that spot! Did someone steal my relay?

JumpinJohn

I'm working on my horn problem too. I have had a hard time finding the relay too, but I read somewhere that it may be on the passenger side fender area..
My research has lead me to believe the clock spring is bad in the steering column. If not that the contacts of the horn button itself may be dirty. My horns work occasionally.

John S
07 RX400H

mandyfig

Your Owner's manual might hold the key to the answers you have posted. Good luck.

RickU

I read that, too, John. There is indeed a relay box on the passenger side (about halfway back on the inside of the fender). There are two relays in there, but neither is marked for the horns. Just to be sure, I did a bit of testing and couldn't find a set of contacts that closed when the horn button is pushed. The mystery persists.

Rainbird

Attached is the horn information on the 2007-2009 RX350. I suspect the RX330 would be the same.

mandyfig

Nice pic, the RX330 should be identical.

RickU

Thanks, Rainbird. That's it! I did a quick test and verified that's the correct relay. I appreciate your help. The manual sadly has no info on relays.

JumpinJohn

HI. Just wanted to tell you I replaced my clockspring, and my horns are working again. I have a pesky air bag light now to reset. eer