TheBeastie Posted August 28, 2007 Share Posted August 28, 2007 I am still puzzling how to wire up FIA battery isolator. Where am I likely to be able to intercept the fuel solenoid wire in order to fix it up into the switch? Is it the brown cable that runs direct from the battery parallel to the main red cable? I haven't quite fathomed out what it is yet! Also how am I best attaching ring terminals to battery cable if I do not have a monster crimping tool? If I put my tiny soldering iron next to the cable I think the poor thing is not up to the job!! I think I have worked out all the other bits now so these are the last pieces of the puzzle. Thanks Malcy Quote Link to comment Share on other sites More sharing options...
LandyManLuke Posted August 28, 2007 Share Posted August 28, 2007 The fuel solenoid wire is un-missable, its the only wire connected to the fuel pump. You probably want to find a grown-up to crimp your main battery cable. sticking it in a vice won't do. you could fill the lug full of solder and use a blow lamp, or make a crimping tool to fit in a vice, as i did, but it's probably easier to find someone with the proper ratchet hex crimping tool (which is £££ to buy) Quote Link to comment Share on other sites More sharing options...
Glue Posted August 28, 2007 Share Posted August 28, 2007 The fuel solenoid wire is un-missable, its the only wire connected to the fuel pump.You probably want to find a grown-up to crimp your main battery cable. sticking it in a vice won't do. you could fill the lug full of solder and use a blow lamp, or make a crimping tool to fit in a vice, as i did, but it's probably easier to find someone with the proper ratchet hex crimping tool (which is £££ to buy) Crimp tools or more acurately lugging tools when used at this size / scale can very often be borrowed or hired from your local electrical wholesaler. It's always worth asking for a freebie, especially if you can take your vehicle to them, buy the crimps / lugs from them and then assemble them in the car park so you're not taking it away from potential paying customers. Glue Quote Link to comment Share on other sites More sharing options...
TheBeastie Posted August 28, 2007 Author Share Posted August 28, 2007 Thanks So I run a double extension from the fuel solenoid cable back through the bulkhead across the FIA isolator switch? Just double checking. Sounds like I need to start scouting around regarding the battery cable crimps before I start the job! Thanks for the warning. I currently only have a relatively little vice anyway so not sure that would help. Oh well, it will get fitted eventually!! Malcy Quote Link to comment Share on other sites More sharing options...
TheBeastie Posted August 28, 2007 Author Share Posted August 28, 2007 Looking at wiring diagram (it is pitch black outside) the fuel solenoid would appear to be a white/blue cable that I need to extend. Can anyone give me an idea of what sort of thickness cable I should get so that I can keep wiring colour integrity but not risk overheating it? I suspect it is not huge current but have made assumptions before Thanks Quote Link to comment Share on other sites More sharing options...
Lars L Posted August 29, 2007 Share Posted August 29, 2007 Pardon me for evenually being thick here, but why do you want a separate cable for the solenoid? If your switch kills the electrics on the battery cable, the solenoid will be killed along with everything else. Or does it still get juice from the alternator even if the battery connection is broken? Well, I don't know... If that's the case, wire in a small relay where the mains connection is taken from the battery. Like this, in Bosch numbering: 30 +battery 85 - earth 86 ignition switch 87 solenoid That way the relay will close when ignition is on, but lose it's power when the FIA switch is off. Please correct me if I'm wrong, it has happened from time to time... Quote Link to comment Share on other sites More sharing options...
LandyManLuke Posted August 29, 2007 Share Posted August 29, 2007 The FIA switch includes seperate NC and NO poles for disconnecting the fuel solenoid (or coil) from the alternator whilst also putting a load (ballast) across the alternator as it spins down, to prevent damaging it. I wouldn't wire in a 30A relay anywhere in the main battery feed, which carries hundreds of amps when the engine is being cranked. Quote Link to comment Share on other sites More sharing options...
Lars L Posted August 29, 2007 Share Posted August 29, 2007 OK, serious lack of know on my part. However, you misunderstood the relay thing, it's not meant to govern the full load from the battery cable, only the fuel solenoid. But that doesn't matter anymore... Quote Link to comment Share on other sites More sharing options...
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