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| Potential electrical prob on the way to work! https://www.ausmini.com/forums/viewtopic.php?f=2&t=72621 |
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| Author: | 9/61 [ Wed Aug 24, 2011 9:41 am ] |
| Post subject: | Potential electrical prob on the way to work! |
Driving into work today I noticed that my tacho had stopped working. About a minute later things started going like I was running out of fuel. No fuel pump sound with acc. on. Initially nothing when I turned the key but then the engine turned over. I have one of those after market electric fuel pumps that is about 2 month old. It's the combination of the fuel pump and tacho that has me thinking it may be a bigger problem Any ideas? |
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| Author: | 66S [ Wed Aug 24, 2011 11:54 am ] |
| Post subject: | |
It soumds like you are not getting power to all this stuff. Check the power wire at the solenoid, the small one that feeds power to everything. It might be loose at the terminal. If that is OK, look at the ignition switch and terminals. Al |
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| Author: | 9/61 [ Wed Aug 24, 2011 1:45 pm ] |
| Post subject: | |
Well I've got it started. Turns out the fuse that always has power had blown. I patched it up with some wire which then blew. I disconected the altenator, wiggled some wires here there and everywhere. then tried the ignition again and the fuel pump worked, but with out that main fuse? Anyway its not on the side of the road anymore. More investigations to come. |
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| Author: | Mick [ Wed Aug 24, 2011 4:12 pm ] |
| Post subject: | |
The fuel pump is fed from the switched fuse, not the continuously powered fuse. Therefore it's probable that with the fault you have somewhere in the car, the voltage dropped to the fuel pump preventing it from operating properly. Now the fuse is removed the voltage has returned to normal. |
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| Author: | 9/61 [ Wed Aug 24, 2011 4:34 pm ] |
| Post subject: | |
So what does the unswitched fuse do? I still have lights!? |
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| Author: | Mick [ Wed Aug 24, 2011 5:05 pm ] |
| Post subject: | |
I haven't a wiring diagram to refer to here, but I believe that apart from the ignition circuit, the main light circuits are unfused. They feed from the battery fed side of the fuse. I'm not absolutely sure, I would like to confirm if I had a wiring diagram but this can be easily proven by removing both fuses and giving them a try. |
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| Author: | 9/61 [ Thu Aug 25, 2011 9:46 am ] |
| Post subject: | |
It looks like the lights are unfused. The only thing connected to the unswitched fuse is the horn (& interior lights if you have them) Some of the wiring in my car is 50 years old now so it is not surprising that I have this problem |
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| Author: | Mick [ Thu Aug 25, 2011 9:18 pm ] |
| Post subject: | |
The lights were both deliberately unfused, so its quite normal. It seems odd, but there you go. |
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| Author: | drmini in aust [ Thu Aug 25, 2011 10:56 pm ] |
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Lights in Oz Minis are left unfused so the candles in your 850 don't both go out at 70MPH and leave ya in the dark. Older Holdens had a thermal breaker that pulsed the output to the lights if there was a short circuit. Hillman Imps had no fuses in the whole car- nada, zip.   
I run a New Era headlamp relay, it has a 30A blade fuse on each circuit. |
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| Author: | woodwormm [ Fri Aug 26, 2011 8:17 am ] |
| Post subject: | |
Doc, do you need two of these New Era relays? one for low and one for High? just looking at this wiring diag and it's showing two... http://www.ebay.com.au/itm/New-Era-Twin ... 0817257996 |
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| Author: | Mick [ Fri Aug 26, 2011 9:15 am ] |
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There's just one, the ERA relay is two individual relays built into one case. |
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