Hi all I have a 2007 Focus 2.0 TDCI, with 55000 miles or so. About 2 or 3 days ago, it started making a whining noise. The noise is directly related to engine speed, and is most noticeable at low revs (say, less than 1500rpm). From the alternator you have the main charging wires, the thick ones (rarely a problem) and a secondary loom carrying either 3 or 4 light weight wires (this is where I found the problem) trace the wiring loom along and you will find a plug (focus goes up beside radiator) at plug end gently pull on wires and one suddenly snaps! cut the same It took me countless hours to find out what the issue was for my constant red battery light.. I hope this helps somebody!Explanation of what the Grill shutte Replacing an alternator in an average car will cost from 1.0 to 2.5 hours of labor, depending on the difficulty, plus the part. A new aftermarket alternator will cost $130 to $320 (part only). An OEM alternator from a dealer will more expensive. Another alternative is to have your alternator rebuilt. M. Msby5b Discussion starter. 4 posts · Joined 2016. #1 · Apr 12, 2016. I was trying to see if anyone has have ever heard of this problem that I'm having. So I removed my alternator today to have it tested because at idle my car would sit at 11.5 volts. So when I tested my alternator it tested good, I went to 3 different parts shops to make sure. A lot of energy passes through that belt. A wrong belt can not make the alternator turn slower without slip, and consequent friction heating. It will not be the starter motor. If the van starts ok, it is not likely to be the battery. So that leaves the alternator, the wiring and the electronic control units. The voltage sits at 13.5v when the smart charge is disconnected from the alternator. Runs 14.1v-14.3v when its connected back in place. I've got a new alternator to put in tomorrow, but my only concern is what do i try next if this doesn't fix the problem. The smart alternator is fully controlled by the PCM using a PWM (Pulse Width Modulation) signal. This basically means that the PCM decides when and how much the battery is being charged. The system is primarily designed to improve fuel economy. It is basically a compromise between fuel economy and battery health. Name: Darren. Ford Model: Focus Mk 3.5 1l EB 125. Ford Year: 2016. UK/Ireland Location: Other/NonUK. Author. Posted November 27, 2017. incidentally, the alternator was a crisp, the plastic was burnt, not melted but crispy black and brittle, the diodes were equally black and carried a really strong smell of burning. zZ2VWn.

ford focus mk2 alternator problems