coxy123 Posted July 18, 2015 Report Share Posted July 18, 2015 Hi, I've just replaced my gearbox. All's working well except I keep blowing a 35A fuse. Heater, wipers seatbelt light are on this fuse. I was behind centre dash to tighten bolts. Any help would be appreciated Link to comment Share on other sites More sharing options...
AidanT Posted July 20, 2015 Report Share Posted July 20, 2015 Hi Some questions 1) What Car? 2) O/D or Std Gearbox? ~Not sure I can help but others might with answers to these questions Link to comment Share on other sites More sharing options...
coxy123 Posted July 20, 2015 Author Report Share Posted July 20, 2015 It's on a 1500 spitfire. No overdrive Link to comment Share on other sites More sharing options...
dougbgt6 Posted July 20, 2015 Report Share Posted July 20, 2015 On mine the reversing light switch is on this circuit. To be honest I'm not quite sure where it's located but it must be on the gearbox? Here's a picture of it: http://www.canleyclassics.com/triumph-spitfire-mkiv/1500-fuse-fuse-cover-courtesy-switch-seat-sensor-control-box-reverse-light-switch-buzzer/ It's part number 13H6084 (or is it PRC1039?) It has a threaded bit that I'm guessing screws into the gearbox and as you've just had the gearbox off? Link to comment Share on other sites More sharing options...
Simon Posted July 20, 2015 Report Share Posted July 20, 2015 Maybe disconnect the reversing switch and see if it still blows. If its OK then what are the wire colours you connected? Link to comment Share on other sites More sharing options...
coxy123 Posted July 22, 2015 Author Report Share Posted July 22, 2015 I've disconnecting the reverse light wires inside the engine bay. It is still blowing the fuse. I am assuming now that I disturbed something when I was doing the centre console brkt bolts behind the dash. There is a double earth wire(black), which isn't connected, that goes into the wiring loom. I can't see anywhere for it to connect to though! Link to comment Share on other sites More sharing options...
dougbgt6 Posted July 22, 2015 Report Share Posted July 22, 2015 I don't think you'd blow a fuse because you HAVEN'T connected an earth. More likely you've earthed something you shouldn't. I'm still not quite clear what's happening, when does the fuse blow? Is it immediate? Or random? What are you doing that triggers it? Link to comment Share on other sites More sharing options...
coxy123 Posted July 22, 2015 Author Report Share Posted July 22, 2015 It's when I turn the ignition on. Link to comment Share on other sites More sharing options...
coxy123 Posted July 22, 2015 Author Report Share Posted July 22, 2015 Just been thinking what I did.Could it be something to do with the seatbelt warning system. Cuz I took seats out Link to comment Share on other sites More sharing options...
dougbgt6 Posted July 22, 2015 Report Share Posted July 22, 2015 Easy to disconnect and test. Have you got a multi meter? Cheap as chips and a useful tool. Link to comment Share on other sites More sharing options...
coxy123 Posted July 22, 2015 Author Report Share Posted July 22, 2015 Yes I've got one. Link to comment Share on other sites More sharing options...
Pete Lewis Posted July 24, 2015 Report Share Posted July 24, 2015 have a browse at the the bullets under the steering column , below the keyswitch , this is a common area for many services and you may have a open wire making earth peter Link to comment Share on other sites More sharing options...
coxy123 Posted July 24, 2015 Author Report Share Posted July 24, 2015 I think I've sorted it. There Was a red/blue wire connected to a red wire. I disconnected them in a process of elimination and the fuse hasn't blown and everything seems to work. Just got to try and work out where these wires should go now. Link to comment Share on other sites More sharing options...
dougbgt6 Posted July 25, 2015 Report Share Posted July 25, 2015 Blue/red on mine (GT6) is low main beam, might not be the same on yours not sure how that would blow the fuse though. Here is a link to some spitfire wiring diagrams, amazing how much easier they are to read in colour! http://www.triumphspitfire.com/wiring.html Link to comment Share on other sites More sharing options...
Pete Lewis Posted July 25, 2015 Report Share Posted July 25, 2015 yes common design was blue red for dip beam and red was side sidelights and panel lights . as both are 'feeds' there must be some crossed with an earth to blow a 35 amp fuse, best place for that would be the panel light area as these earth on an eyelet under the knurled clamp screws. Pete Link to comment Share on other sites More sharing options...
coxy123 Posted August 28, 2015 Author Report Share Posted August 28, 2015 I think I have finally tracked down the problem. The terminals on the wiper motor were loose. I am assuming they kept touching causing a short and blowing the fuse. I have replaced all the terminal connections on the wiper motor and (touch wood) , it hasn't blown since. The moral of this story, don't assume it's something you have done and carry a bag of 35 amp fuses. Thanks for all your input, I've learnt loads going through the different theories. Steve Link to comment Share on other sites More sharing options...
Pete Lewis Posted August 28, 2015 Report Share Posted August 28, 2015 Pleased its sorted pete Link to comment Share on other sites More sharing options...
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