All 4 main beams on single fuse & single speed heater fan

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Peter S
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All 4 main beams on single fuse & single speed heater fan

Post by Peter S » Fri Dec 08, 2017 7:55 pm

Hi I'm trying to raise enthusiasm to start sorting my GTC
1st problem, which previously killed it, is that all 4 main beam lights work off headlight fuse 1, fuse 4 has power to it but does nothing! I found this out when the fuse blew and all the mains went off (just like my 5a used to, different reason I know! ) Is anyone aware of any good reason why it's been changed :?: and how it could have been changed :?: All 4 beams now also flash.
Also the heater blower only works a one speed any ideas why :?: Is it only 1 blower unit working or a reostat somewhere in the system or the switch. Peter C's wiring diagram isn't giving me a clue but electrics aren't my strong point.
Then I only have to sort out the clock which was working but not now and the radio, the aerial, oh and install auxillary lights and ..etc


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scimjim
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All 4 main beams on single fuse & single speed heater fan

Post by scimjim » Fri Dec 08, 2017 7:58 pm

having 4 main beams on one fuse isn't a good idea - possibly a bodge due to dodgy wiring or melted clips on the other fuse?

both heater motors have a resistor to give two speeds - if both have failed I'd look at the switch first, then the wiring (given the above :-))


Jim King

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Peter S
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All 4 main beams on single fuse & single speed heater fan

Post by Peter S » Fri Dec 08, 2017 9:00 pm

Thanks- fuse holder & clips look OK & power to the other side of the fuse, wiring a complete dogs breakfast all over :w. So I'll have to try and find bodge. Thought heater switch looked OK but will recheck first.


Peter S
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Peter S
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All 4 main beams on single fuse & single speed heater fan

Post by Peter S » Sat Dec 09, 2017 1:43 pm

I give up there's no way I want to sort this lot out. Everything is rejointed or scotch? Blocked together including the inner mains fed off the outer mains. The fuse box looks and is wired OK, wiring all looks OK, no sign of smoke escaping :!: I guess it was a "fix" for a bad earth.
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scimjim
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All 4 main beams on single fuse & single speed heater fan

Post by scimjim » Sat Dec 09, 2017 2:05 pm

I can hear Geoff Cooper cursing from down here :|


Jim King

Current: SE5 (8Ball), TI SS1 (snotty), 1600 SS1 (G97), 1600 SS1 (C686CCR), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
Previous: SE5, 3 x SE5a, 2 x SE6a, 3 x SE6b, GTC, 2.9i GTC, 3 x 1600 SS1, 1300 SS1, Mk1 Ti Sabre, Mk1.5 CVH Sabre
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), Sabre/MX5 auto (The Flying Broomstick),
1300 SS1 (Number One) & Sarah's coupe.
CURE THE FAULT - NOT THE SYMPTOMS

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All 4 main beams on single fuse & single speed heater fan

Post by Roger Pennington » Sun Dec 10, 2017 5:57 pm

Oh dear! :( I think you're right, Jim....
Peter S wrote:
Fri Dec 08, 2017 7:55 pm
All 4 beams now also flash.
That, at least, is what you'd expect. Headlamp flash should operate both the inner pair of main filaments and the outer pair of main filaments. Whether, in your case, that result is being achieved through the usual wiring, is a slightly different matter. As Jim mentioned, all 4 mains shouldn't come through one fuse.

I was wondering if someone might have bypassed a faulty main beam relay (which only operates the outer mains), but re-reading your original note, you've got power to both fuses, which tends to rule that out, so perhaps a problem downstream of the fuse?



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All 4 main beams on single fuse & single speed heater fan

Post by ScimmyMike » Sun Dec 10, 2017 6:09 pm

Looking at that rats nest it would appear to be like mine was before I pulled it all apart and sorted it out properly, took out all scotch-locks covering the wire insulation break with heat shrink, and the like, replaced bullet blocks with new cleaning up / replacing bullets themselves, all was fine after that, my main issue was the fuse box on the front panel passenger side, very iffy fuse connections there, had I kept the car I would have replaced with a modern blade type fuse box and will be doing just that with my SE5A once on the road and also my coupe.
Not expensive but certainly time consuming and worth it.


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