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Jan 30, 2018 21:08:12 GMT
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Despite it depressing me I'm going to have to sort the Alfa spider out, if I replace a couple of the fuses with the keys out of the car the dash lights all come on and the fuel pump primes, a common problem with these cars is the 'melting fuse box' usually caused by the heated rear window, luckily mine is a spider so hasn't got one.
I removed the fuse box today and visually it looks spot on, there is no indication of melting/burning or anything though all I can see is into where the fuses/relays plug in, I can't see the actual circuit board nor access it.
It has been suggested that it could be a short circuit, I know in theory that something has broken and that's about my knowledge, so any handy tips, guides or general advice on where to start.
Ta for looking.
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Last Edit: Feb 20, 2018 13:53:26 GMT by waynedear
Bicycle x1
Alfa Giulietta (now wife's)
Alfa 156
BMW 630i
Honda rc36
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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Jan 31, 2018 10:11:31 GMT
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Sorry but you don't really explain the issue. Is there a problem with the fuse box or is it just blowing fuses? Your probably right tho, there's some sort of current leaking where it shouldn't. You kind of just have to track it down. Could be fuse box itself but more likely a damaged cable or somthing simlar.
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Jan 31, 2018 10:58:17 GMT
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Sorry but you don't really explain the issue. Is there a problem with the fuse box or is it just blowing fuses? Your probably right tho, there's some sort of current leaking where it shouldn't. You kind of just have to track it down. Could be fuse box itself but more likely a damaged cable or somthing simlar. Issue started with the heater blower not working, common on these, first check is a kick, still nothing, 2nd check drop out the blower and all is well and it spins freely. Next I went to the fuse box, fuse is good, that leaves the other common problem of the resistor, I have a spare somewhere. While I was in the fuse box I thought I would check every fuse, about the 5th one I found a blown one, I put a new one in (the keys are on the passenger seat) the car immediately primed the fuel pump, I got out of the foot well and the dash was lit up, still no keys in, removed the fuse and tried it again, still lit up, I started the car, the dash symbols stayed on and when I turned the key off and removed them the car kept going. I removed that fuse and pulled the next in line, when I put it back the fuel pump primed and lights came on. I have seen a picture of a gtv/spider fuse box with the 'melting' issue and mine on removal looks nothing like it, mines perfect with no signs of any issues. Heading over to the lockup now to do an under dash visual inspection. |
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Bicycle x1
Alfa Giulietta (now wife's)
Alfa 156
BMW 630i
Honda rc36
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Jan 31, 2018 11:19:10 GMT
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get a wiring diagram for the fusebox, then just bell it out from each fuse to where is should go, and see if its going where it shouldnt.
I would be tempted to open the case up.
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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Jan 31, 2018 12:36:21 GMT
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Ahh I get you now. My guess is there's a part of the fuse box that has a permanent live and part that has switched live. The fuse that was blown will have blown as that circuit is leaking current over from the permanent side to the switched side, bypassing ignition switch in the process.
Its only a guess but it sounds like the fuse box is at fault.
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Jan 31, 2018 16:46:26 GMT
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Thanks for that,
welshpug I have opened up many things that say 'can't be opened' from the look of it if I open the fuse box it will mean breaking stuff, I'd be gutted to find there was nowt wrong with it but it's now unusable ☹️
slater, I get what you are saying, going to try and borrow one and see if it works. 👍
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Bicycle x1
Alfa Giulietta (now wife's)
Alfa 156
BMW 630i
Honda rc36
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Jan 31, 2018 21:04:42 GMT
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Well it was not easy (not breaking it) but it's open, then I found on't internet a how to check a fuse box with a multimeter, then I found my multimeter does not do continuity ☹️
To add I am just learning to do ohms resistance tests.
Apparently is it a 3 layer flexi pcb and a curse word to find shorts on.
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Last Edit: Jan 31, 2018 22:40:54 GMT by waynedear
Bicycle x1
Alfa Giulietta (now wife's)
Alfa 156
BMW 630i
Honda rc36
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Feb 17, 2018 20:11:46 GMT
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Well I got somewhere eventually, all sorts of suggestions were followed, nothing helped, some made it worse.....
This very morning I cleaned yet again every fuse and relay and where they plugged into, I then yet again removed them one at a time, well curse word me, towards the last couple of fuses I pulled the horn fuse and the lit up with no keys dash went blank, put the keys in and the car started as normal and I could turn it off with the key, so chuffed there may have been a little jig.
The horn still works without the fuse but at least I know what to concentrate on now, I can even use the car, well when I put everything back on that I removed whilst checking 😁
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Bicycle x1
Alfa Giulietta (now wife's)
Alfa 156
BMW 630i
Honda rc36
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Feb 18, 2018 20:41:21 GMT
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Water in the system somewhere. Or have you checked your ignition switch? No water mate, car was and still is indoors when it started, ignition switch has been checked, it’s deffo a short in the horn, radio, cig lighter, interior light fuse circuit. I am erring towards the radio, hell of a lot of wires crammed in a tight space with some sharp support pieces. And you know what, I now can’t get the bloody radio out  |
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Bicycle x1
Alfa Giulietta (now wife's)
Alfa 156
BMW 630i
Honda rc36
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Feb 20, 2018 13:55:18 GMT
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Sorted, it was the radio, unplugged it and put the fuse back in and everything is normal, no live car and I can turn on the car and turn off the car with the key.
Thanks to all
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Bicycle x1
Alfa Giulietta (now wife's)
Alfa 156
BMW 630i
Honda rc36
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