Hi Dave,

May be me? I performed the bypass on a failed red can bulb out sensor on the green 1992 Volvo 240 GL.

Dave Barton provides this info here:

https://www.240turbo.com/volvo240mods.html#bulbfailsens2

Click the image with "<<< Red Sensor 1362370: Diagram at left is for the RED 1986-93 ...."



Art posted page that includes a diagram of the black bulb out sensor. Or maybe this Turbobricks thread?:

https://forums.tbforums.com/showthread.php?t=240085

I used Art's info here yet adapted to the change for the red bulb out sensor. Than I found Dave Barton's info.

I guess you could find the info in the search or using Bing or Google searching the brickboard. I looked for an eloquent discussion as to what rear wheel is the primary drive wheel on an open differential rear axle on 240.

The headlights remain brighter. Yet as I do, I inspected and tested the entire exterior lighting system from the inner-fender B+ power distribution junction block to all bulb sockets and connections to ground. I also had to clean and reseal the lousy US-DOT plastic lens headlamp assemblies. The same for the awful flex PC board six-panel wrap around taillights in cleaning the assemblies (simple green and rather warm water) with better condition flexi PC board and correct some prior owner damage from incorrect bulb holder / bulb install. The Portland and Spokane junkyards help. To this day the exterior lighting is bright and clear. Though the halogen 9004 bulbs, a crappy system at that, age and dim. So, got a new set the best or second best Sylvania offers. Phillips or GE may make better 9004 bulbs.

Though best would be may be LED bulbs with more lumen put for the 1986+ three rear brake lights and brighter LED turn signals / front running lights.

Speaking of bandwidth, the two or three large facebook forums call the bulb out sensor a "bulb failure relay" or some such. One more way to bring them here so more donations and advert revenue for Jarrod's brickboard.com.

Each individual message is nearly nothing in bandwidth. The cost is in hosting the site, the client hosting side services, and the https TLS 1.2 in / out encryption service the brickboard uses.

The Art is correct that we want to use the search feature to find post by topic that are useful. Maybe update to the current inter-subjective (shared) notions so we can share in the best understanding or approach to the issue.

I'm more concerned about the capacitors in the engine control ECUs, Speedo / ODO, and such, as they age and fail. I'd hoped to have a D-Jetronic 140 or 164 with a few extra D-Jet ECUs as they do continue to run, yet caps, transistors, diodes, resistors do fail. A little more complicated than a Pioneer Silverface receiver amp restore! Be nice to have a basement or garage bench someday soon to do the work with soldering pencil in hand.

Also, fun to deliver useful info to the facebook Volvo RWD crowd. Many their run on the mythos that 240 and other RWD Volvo accepts abuse and neglect unendingly, and then a post about no-start, non-op, #11 fuse blows repeatedly, can't pass emissions or safety inspection, and so forth. So I try to bring them here. Yet do mention to search and than ask. Account and posting are free. As you feel free to donate!

Happy Monday!

Earl Grey Tea so Brisk and Strong ...
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