Hiw do i test my alternator rectifier, diode , regulator?
I'm not an electronics wizz so simple terms please.
I can use a multimeter.
I dont want to keep starting engine as it will drain my rapidly diminishing starter battery.
Results 1 to 10 of 11
12-06-11, 09:55 #1
how do i test rectifier, diode , regulator on alternator.
12-06-11, 09:59 #2
I take mine off & got to an auto-electrician, they can check it in seconds & can do the repair - often while you wait. And you only pay car prices, not marine ones. Test will probably cost about 20 quid tho & repair another 30 ish.
12-06-11, 10:23 #3
There's a book on free download called 'The 12 V doctor's alternator book' by Edgar Beyn. If you can't find it PM me your e-mail address and I'll send it.Answers to some technical queries at http://coxengineering.sharepoint.com
12-06-11, 10:24 #4
Thats the obvious solution searush, but im on the boat holed up away from home harbour and car, its a sunday, and if i can find the problem today i may just be able to find a way to bodge fix it so i have enough juice in my batteries for a solo run home tomorrow with my beloved autopilot doing the hard work.
So, does anyone know how to test these? What resistances should i look for with the rectifier? Etc...
12-06-11, 10:41 #5
I have just posted details of how to test the rectifier on the other thread
Last edited by VicS; 12-06-11 at 10:44.
12-06-11, 10:45 #6
12-06-11, 10:47 #7Answers to some technical queries at http://coxengineering.sharepoint.com
12-06-11, 10:51 #8
Link works for me. Take care over 0/O.Thick as two short planks
12-06-11, 10:53 #9
I've repaired a handful of alternators for myself when I needed to. I can tell you that it's impossible to test the diodes without removing the diode array, you need a large soldering iron (usually). Most common issues are bad wiring./connections to and from alternator and battery (remember the negative connection to engine (usually), battery defects are common too. You can remove the regulator as a desperate gambit but you have to ensure that you don't overcharge your battery.If I'd wanted to live in a Banana Republic I'd have gone to South America.
12-06-11, 10:55 #10
Yep works for me too.
But wiggling the wires will probably sort it out
Last edited by VicS; 12-06-11 at 10:57.