Alternator Wires (Zetec)

JamesyRS · 12-02-2010, 02:44 PM

Hey guys,

Im pretty sure both wires should be connected but all ask anyways. The main red wire is attached but I have a small blue wire hanging near by. What is this for? I know it for alternator as its been snapped off by overtightening but could this be problem being my battery dying all the time. I was going to buy a new battery today and thought Id have a look and found this little problem so if this wire is for charging then possibly wont need a battery? Thanks for any help people

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martysmartie · 12-02-2010, 05:23 PM

Yes it does the blue wire is live when ignition is switched on (It's the return from the battery light) it excites the field windings which starts the charge process if this is disconnected there will be no output unless revved hard.

At the moment you will have no battery light and will not have any charge either.

Martin

tabetha · 12-02-2010, 08:20 PM

What he said, if it's snapped off, can you not open the rear of the alt/cover and connect a wire this way.
tabetha

JamesyRS · 12-02-2010, 10:12 PM

thanks guys instead of opening it up can it be soldered back onto terminal?

martysmartie · 13-02-2010, 11:13 AM

If you have snapped connector rather than terminal then I would just put a small ring connector on end with a nut, I would not solder in case it damages components inside the alternator due to heat.

Martin

tabetha · 13-02-2010, 12:10 PM

Solder will be fine, heat will not be a problem, but with you needing to get a bolt to that temp(300C or thereabouts) any close fitting plastic will melt, this is with it off the car and opened up though, plus you will need a beefy iron to get enough heat, they don't get any hotter but can solder things thicker as they can keep up with heat needed.
As said a no no on the car really.
tabetha

JamesyRS · 13-02-2010, 10:55 PM

cheers guys, have a wee go at it tomorrow, got few other jobs to do too, the terminal still has a little stub so may try see if I can get a bolt and ring on but highly doubt it

thanks again for help

12-02-2010, 10:12 PM	#4
JamesyRS PassionFord Regular Garage is empty, add now Trader Score: (3) Join Date: Jan 2010 Location: Linlithgow Posts: 450 Rep Power: 3	thanks guys instead of opening it up can it be soldered back onto terminal? __________________

13-02-2010, 10:55 PM	#7
JamesyRS PassionFord Regular Garage is empty, add now Trader Score: (3) Join Date: Jan 2010 Location: Linlithgow Posts: 450 Rep Power: 3	cheers guys, have a wee go at it tomorrow, got few other jobs to do too, the terminal still has a little stub so may try see if I can get a bolt and ring on but highly doubt it thanks again for help __________________

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12-02-2010, 05:23 PM	#2
martysmartie PassionFord Post Whore!! Garage is empty, add now Trader Score: (1) Join Date: Dec 2007 Posts: 4,945 Rep Power: 10	Yes it does the blue wire is live when ignition is switched on (It's the return from the battery light) it excites the field windings which starts the charge process if this is disconnected there will be no output unless revved hard. At the moment you will have no battery light and will not have any charge either. Martin

12-02-2010, 08:20 PM	#3
tabetha BANNED BANNED Garage is empty, add now Trader Score: (0) Join Date: Jul 2006 Location: uk Posts: 24,646 Rep Power: 0	What he said, if it's snapped off, can you not open the rear of the alt/cover and connect a wire this way. tabetha

13-02-2010, 11:13 AM	#5
martysmartie PassionFord Post Whore!! Garage is empty, add now Trader Score: (1) Join Date: Dec 2007 Posts: 4,945 Rep Power: 10	If you have snapped connector rather than terminal then I would just put a small ring connector on end with a nut, I would not solder in case it damages components inside the alternator due to heat. Martin

13-02-2010, 12:10 PM	#6
tabetha BANNED BANNED Garage is empty, add now Trader Score: (0) Join Date: Jul 2006 Location: uk Posts: 24,646 Rep Power: 0	Solder will be fine, heat will not be a problem, but with you needing to get a bolt to that temp(300C or thereabouts) any close fitting plastic will melt, this is with it off the car and opened up though, plus you will need a beefy iron to get enough heat, they don't get any hotter but can solder things thicker as they can keep up with heat needed. As said a no no on the car really. tabetha

13-02-2010, 10:55 PM
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