armstrrw 15 #1 Posted June 5, 2012 I own a 1987 312-8 (21-12K804) that is a great machine! She is in excellent mechanical condition but has problems with the dash test light panel. The parking brake and seat lights remain on as long as the inline fuse/battery are connected. Both brake and seat swithches have been replaced; wiring checked for breaks; connectors inspected/cleaned; grounds inspected/cleaned. The PC Board has been removed, connections inspected/cleaned and board examined for obvious damage. It appears to be in great shape. Once all reassembled, the two lights continue to glow. Suggestions? Share this post Link to post Share on other sites
Wheel Horse Kid 105 #2 Posted June 6, 2012 I really do not have an answer for you, but I can for sure sympathize with you! Only my oil check test light works and none of the others do on my 312. Still do not have that one figured out! Share this post Link to post Share on other sites
can whlvr 994 #3 Posted June 6, 2012 well as i have have stated before to me thats the big draw back of the later models with the boards,they all seem to screw up and create electrical problems,it sounds as if its your board,if nothing else is wrong i wouldnt worry too much,i had my 87 414 board catch on fire Share this post Link to post Share on other sites
wheeledhorseman 579 #4 Posted June 7, 2012 A component side photo of the board you have would be useful here as I suspect it's the same board as I have in a 227-5. The board in mine was in good visible condition i.e. the connections weren't corroded etc but I had the glowing lite syndrome and tracked it down in the end to the chip on the board. These run pretty near their limits in terms of voltage supply and I suspect get fried or at least partially fried inside if there's a poor battery connection that lets higher than normal voltage spikes get through from the charge regulator. If you're good with a soldering iron or know someone who is then it's not too difficult to replace the chip. Strange thing is that whilst it was very satisfying to have a working board again I rarely if ever look at the indicators. Andy Share this post Link to post Share on other sites
wheeledhorseman 579 #5 Posted June 7, 2012 Sorry, just remembered that I posted the work I did on mine - it's here I basically managed to patch up the chip by providing an electronic 'crutch' for it to limp along with. It proved a point that it was the chip so I went on to replace it. Andy Share this post Link to post Share on other sites
