Apparently, there is a small repair shop in Tilok Uthit 2 (that's the road to the side of Royal City Hotel). Corner unit about opposite the Cashew Factory. Looks more like a home than a repair shop. Reportewd as the “cleanest/best equipped repair shop” ever seen. They specialise in Alternators and Starters.
Supplier and service
centre for all major marine
suppliers. Fully equipped and trained for warranty and service
work on all well-known brands of electronics
. At the Boat Lagoon
. Call 076 239112 or email email@example.com
Octopus Electrical Service
, service and rewiring jobs. All types of electrical installations, including GPS
, navigation equipment
, autopilots, fishfinders and communications
. At the Boat Lagoon
. Call or fax 076 273 379, or contact Mick Kealy on mobile 01 396 0785, email firstname.lastname@example.org
FWIW: Installing a diode in series with the Sense wire will "fool" the internal regulator into thinking the battery
voltage is about 0.6 volts lower than it actually is.
ALTERNATOR VOLTAGE TESTS
1. Set Voltmeter to DC Volts (20V scale), and connect the DC Voltmeter test leads to the battery
post (Red lead to Positive Post, and Black(or Yellow) to Negative). With engine “off”, read and note battery voltage.
2. Start the engine, and at “Idle” RPM
, check the voltmeter reading. At very low speeds the alternator output may be lower than the regulator setting; hence you will expect to read the battery voltage.
3. Increase engine RPM, and note increasing voltage reading to a maximum of about 14.2 - 14.4 volts (12V Nominal System - expect ± 29.5V in 24V system).
If no voltage increase noted, you likely have a bad voltage regulator, or poor wiring
(Alt’ to Batt.). Go on to test 3B.
If Voltage increases go on to test 4.
3B. With engine “off”, connect Positive test lead to Alternator Output (“B+”, or “A”), and Negative Lead to the Negative Ground Post (“Neg”, or “E”) of Alternator. Start engine. If Voltage increases with increased RPM, your regulator is OK, and the problem is in the wiring
. Go on to test 3C.
3C. Discharge the Battery to less than 12.5 Volts. Check for Voltage drop between the Alternator and Battery, as follows..
Connect the Positive Test Lead to the Alternator Positive Output Terminal (B+) and the Negative Lead to the Positive Battery Post. Crank the engine, and increase RPM to a fast idle. Observe Voltage. If the voltage climbs to as much as 0.02 Volts (or more), the positive cable has a high resistance. Repair or replace cable.
Check for voltage drop in the negative cable, as above - but: connect the Positive Lead to the Alternator’s Negative Output Terminal, and the Negative Lead to the Negative Battery Post. Analyze as above.