roryb Posted May 19, 2014 Report Share Posted May 19, 2014 My SC900 just stopped working one morning. Button backlights still on but now power to buttons or the red led flashing lights. Fuse in engine bay seem fine. Is there an internal fuse in the radio? Has anybody had this issue before? Sorry for th double post. I put it in cosmetic by accident. Link to comment Share on other sites More sharing options...
Kevin. Posted May 19, 2014 Report Share Posted May 19, 2014 My SC900 just stopped working one morning. Button backlights still on but now power to buttons or the red led flashing lights. Fuse in engine bay seem fine. Is there an internal fuse in the radio? Has anybody had this issue before? Sorry for th double post. I put it in cosmetic by accident. maybe the amp? sounds like a loose conntection Link to comment Share on other sites More sharing options...
BEJinFBK Posted May 19, 2014 Report Share Posted May 19, 2014 Check both fuses. 7 is constant, 32 is switched. The illumination is part of dash lighting. Link to comment Share on other sites More sharing options...
roryb Posted May 20, 2014 Author Report Share Posted May 20, 2014 Both fuses are good. Amp plugs etc seems fine. Is there an internal fuse in the hu? Also which lead is the power to the hu? Link to comment Share on other sites More sharing options...
BEJinFBK Posted May 20, 2014 Report Share Posted May 20, 2014 No internal fusing. On the SC900/901, there are two "main" connectors. The "A" connector is pretty much full. The "B" connector for an externally amped HU only has a single wire for speed. Constant comes in on two wires on the A connector: Green/Brown on pins 4 and 12. Switched should show on a single wire on the same connector: Violet/Yellow on pin 13. Link to comment Share on other sites More sharing options...
roryb Posted June 1, 2014 Author Report Share Posted June 1, 2014 I took the HU out last week to check the loom and plugs etc. I tried an 850 HU and it worked. Plugged back in the sc900 and it works. I Dono what was wrong but whatever, it works again. Link to comment Share on other sites More sharing options...
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