1978c81 385 #1 Posted June 15, 2016 Anybody ever try these on their 3 4 or 5 series? I'm sure they will look great but $39 a bulb. Share this post Link to post Share on other sites
Tuneup 1,452 #2 Posted June 15, 2016 Amazon has that part number at $21 so you're at about 1/2 your price. Might make sense for my C-125 Black Hood. Share this post Link to post Share on other sites
pfrederi 18,696 #3 Posted June 16, 2016 Be careful....You need to make sure your 300 series has a regulated charging system. WH went cheap on some 3 series 310's an 308's especially and used an unregulated 3 amp charging system with an ac lighting circuit that produces varying voltage up to 30 or more volts i believe. If your head lights will work with the engine shut off you are OK. if they go out when the engine stops you may have a problem. The box in your pic indicates ac/dc but only 12 volts. 3 Share this post Link to post Share on other sites
1978c81 385 #4 Posted June 16, 2016 Thanks for the heads up. I have a 312. I'll check to see if lights stay on when engine is off. Share this post Link to post Share on other sites
whtractors24 3,374 #5 Posted July 5, 2016 On 6/16/2016 at 9:09 AM, pfrederi said: Be careful....You need to make sure your 300 series has a regulated charging system. WH went cheap on some 3 series 310's an 308's especially and used an unregulated 3 amp charging system with an ac lighting circuit that produces varying voltage up to 30 or more volts i believe. If your head lights will work with the engine shut off you are OK. if they go out when the engine stops you may have a problem. The box in your pic indicates ac/dc but only 12 volts. your correct most of them had 3 amp diode more in the 310's I've seen them. @1978c81 his machine I believe has a real voltage regulator! Share this post Link to post Share on other sites
82Caddy 851 #6 Posted July 5, 2016 I have some on my D series as the headlights...but I also have a gm alternator on my tractor. Haven't tried them out at night yet. Share this post Link to post Share on other sites