HUNTSMAN270 30 Posted March 4, 2016 Report Share Posted March 4, 2016 My Leyland Daf 7.5 tonne Lorry main beam is not working at all I have checked all fuses all good I have changed bulbs for new The blue light on dash works to say the main beam is on but not lighting up bulb Anyone know what else I can try Quote Link to post Share on other sites
Chid 6,542 Posted March 4, 2016 Report Share Posted March 4, 2016 Wiring needs checking Quote Link to post Share on other sites
walshie 2,804 Posted March 4, 2016 Report Share Posted March 4, 2016 Relay? Quote Link to post Share on other sites
forest of dean redneck 11,622 Posted March 4, 2016 Report Share Posted March 4, 2016 Headlight switch 1 Quote Link to post Share on other sites
walshie 2,804 Posted March 4, 2016 Report Share Posted March 4, 2016 The blue light on the dash wouldn't come on if it was the switch. Quote Link to post Share on other sites
HUNTSMAN270 30 Posted March 4, 2016 Author Report Share Posted March 4, 2016 How do I check if it is the relay Quote Link to post Share on other sites
walshie 2,804 Posted March 4, 2016 Report Share Posted March 4, 2016 How do I check if it is the relay Find out which one it is, and swap it for one of the others. Quote Link to post Share on other sites
HUNTSMAN270 30 Posted March 4, 2016 Author Report Share Posted March 4, 2016 I take it they are on the fuse board Quote Link to post Share on other sites
walshie 2,804 Posted March 4, 2016 Report Share Posted March 4, 2016 Some are, or they might have their own little plastic box. You really need to check the manual...or google. The relays are the ones that look like little plastic or metal cubes. Quote Link to post Share on other sites
Chid 6,542 Posted March 4, 2016 Report Share Posted March 4, 2016 What model is it , if its a 45 the relays were behind the dash Quote Link to post Share on other sites
forest of dean redneck 11,622 Posted March 4, 2016 Report Share Posted March 4, 2016 Wiring rubbed through? Quote Link to post Share on other sites
HUNTSMAN270 30 Posted March 4, 2016 Author Report Share Posted March 4, 2016 Daf 45 150 2004 model Are these relay things expensive things Quote Link to post Share on other sites
walshie 2,804 Posted March 4, 2016 Report Share Posted March 4, 2016 Daf 45 150 2004 model Are these relay things expensive things For cars they are less than a tenner. Can't imagine they'd be loads more for a truck. IF that's what it is of course, but its got to be one of the most likely suspects. Quote Link to post Share on other sites
HUNTSMAN270 30 Posted March 4, 2016 Author Report Share Posted March 4, 2016 Cheers walshie I checked fuses renewed bulbs can't think anything else If relay is knackered would the blue main beam light on dash still show up Quote Link to post Share on other sites
walshie 2,804 Posted March 4, 2016 Report Share Posted March 4, 2016 Cheers walshie I checked fuses renewed bulbs can't think anything else If relay is knackered would the blue main beam light on dash still show up Yes, that lights up when it gets power from the switch. It doesn't "know" if the lights are working or not. Quote Link to post Share on other sites
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