Clicking Battery Saver RelayBattery saver relay
Posted 09 February 2013 - 12:26 PM
I've got an 2003 focus 3-door 1.8 zetec which was absolutely fine until the original alternator went pop last year. We took it to a garage and they fitted a replacement... that lasted 6 months then fried it'self.!
We've now had another alternator fitted..(... both are RTX units) but now when the cars ticking over at night the lights are going from dim to bright quickly as if there's not enough power at tickover to keep a constant light, electric windows are slow (lift the revs and they're ok).. and sometimes the battery light comes on even at speed.. but the worst problem is that the battery saver relay behind the glove box is clicking like crazy.!!
Irrispective of whether you're doing 70mph .. or ticking over in the drive, but as soon as you give the alternator something to do and put it under load.. ie, put the front & rear screen de-misters on.. the clicking seems to stop.
Rather than suggestions of what it might be, i'd be over the moon if someone could give me a genuine technical explaination 'before' i take it along back to the garage who did the work. I'm thinking the alternator isnt man enough for the job ..or it's faulty, and it's confusing the smart charge system with irregular voltage supply. Battery is 12.8v standing cold.. and 14-15v engine running
Cheers guys .. appreciate your help.. Paul
Posted 09 February 2013 - 01:20 PM
Is a silver calcium battery fitted?
Not too sure.. but it is the same one thats been fitted and worked 100% perfect for the last 20k miles with the original alternator.. and the 1st replacement alt.. the only thing thats changed is those alterntors
Posted 09 February 2013 - 06:06 PM
Posted 09 February 2013 - 09:01 PM
if the wron g battery is fitted it will fry the alternator
How would it do that Arthur .. wouldnt the smart charge system pick that up and regulate charge to the battery and not cook the alternator.
Posted 09 February 2013 - 10:23 PM
Posted 10 February 2013 - 10:55 AM
Either way.. this battery was fitted to the car when we bought it, we've now done in excess of 20k miles on that battery and original alternator before the bearings went.. the problems started when replacement alternators were fitted.
PS . The lastest... last night both dip beams blew and the ABS light came on and the speedo/rev needles went crazy.! Really could do with a electics tech/wizard.. is there one here on this forum.?
Posted 10 February 2013 - 12:35 PM
the smart charge puts max voltage 18v into a cold battery that needs charged mainly on a healthy battery 14.4v max as the electrolyte heats up in the battery cells the silver calcium plating is used and sends a signal back to the ecu this in turn drops the voltage from tha alt to the battery if the battery doesnt have silver calcium in the electrode posts then the system does not recognise any signal from the battery back to the ecu and will keep charging at max voltage this boils the electrolyte and eventually the electrolyte gets so low the voltage feeds back causing the smart charge to blow out this results in over charging or not charging enough dipped beams blowing means the system is pumping out way too much voltage so either the alternator is the wrong make or type for the car the batery is incorrect and causing these issues cheapest item to check and rules it out no matter how many miles the cars done or the wiring was damaged upon fitting the new alternator either way a garage who knows how to examine the wave form data from the alternator is needed which is a ford dealer if you want it fixed its not a do at home job and will need a dealer to look at it
Posted 10 February 2013 - 01:39 PM
Like i say, i'm going back to the original garage as they need to be given 1st chance to offer a repair (not trying to fix it myself, just want to be armed with enough info as possible) if they cant diagnose a fault then yes it will go to Ford main dealers for a fault code reading and repair.
After all this It still doesnt explain the battery saver relay clicking and the other probs... only that when you search the net for Focus RTX alternators.. they replies and feedback for that manufacturer are terrible along with ''do not buy''.. lol.!
Posted 10 February 2013 - 01:58 PM
Posted 10 February 2013 - 02:31 PM
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