Honda TRX 420 not charging

[GAM]

Is there anyone on here who can throw some light on my no charging dilemma?
There is no current going to the battery, it’s a new batter.
I had done a directional diode test on the DC side of the rectifier/regulator, all seems to check out ok.
There are three yellow wires coming to the rectifier, which I believe are from the stator, does anyone know how to test these for AC current?

 

[wanton dwarf]

Well I guess AC current would come from AC voltage .. a multi meter should show AC voltage on the correct setting.

Once you've identified a voltage - I don't know if you can get a clip on ampere meter in the space - they do AC amps.

Something like this ?

https://cpc.farnell.com/tenma/72-3500/clamp-meter-mini-200a/dp/IN07619?mckv=suvmcVJRx_dc|pcrid|224652015486|kword||match||plid||slid||product|IN07619|pgrid|49730281329|ptaid|pla-369044297430|&CMP=KNC-GUK-CPC-SHOPPING&gclid=EAIaIQobChMIssTE_K-_7QIV1e3tCh3Y6ACdEAQYBSABEgIHfPD_BwE

 

[El Gordo]

The yellow wires, call them 1, 2 and three.
With the multi meter on AC voltage and the engine running, one lead from meter on no. 1, the other on 2. You should get about 40 v at 2000 rpm ish. Then check 1 and 3, the 3 and 2.
The above test should be done with the voltage reg dis-connected.
If you have voltage on each of the phases then check for continuity to earth on each phase. Meter on ohms and check between each yellow wire and earth, any circuit to earth means its goosed.

 

[GAM]

The yellow wires, call them 1, 2 and three.
With the multi meter on AC voltage and the engine running, one lead from meter on no. 1, the other on 2. You should get about 40 v at 2000 rpm ish. Then check 1 and 3, the 3 and 2.
The above test should be done with the voltage reg dis-connected.
If you have voltage on each of the phases then check for continuity to earth on each phase. Meter on ohms and check between each yellow wire and earth, any circuit to earth means its goosed.

Thank you, I wasn’t sure if I had to check each yellow wire to earth!
In layman’s terms, I set to AC then I put the Red lead to yellow 1 and the Black lead to yellow 2, same on 1&3 and 3&2.

 

[El Gordo]

Yep, don’t forget to set the meter to ac

 

[GAM]

Yep, don’t forget to set the meter to ac

 

[GAM]

Yep, don’t forget to set the meter to ac

Just tested, 1&2 45v 1&3 45v 2&3 45v
Does this mean the rectifier is at fault?

 

[El Gordo]

Just check that none of the yellows have any continuity to earth.
If they don’t , reg is faulty.
Only other possibility is wiring fault. Red wire going to reg should show battery voltage. There is nothing else to check!

 

[Mc115reed]

Just tested, 1&2 45v [emoji818]️1&3 45v [emoji818]️2&3 45v [emoji818]️
Does this mean the rectifier is at fault?

I’d just order new rectifier tbh... I got one for my 350 for £15 off eBay off a breaker I bet a new one is £50 hardly worth f**king about with for that too know it’s right

 

[2wheels]

hondasare well known for frying the rectifer which in turn knackers the battery.

 

[davidroberts30]

and if its the ES will knacker the ecu for that too

 

[steveR]

hondas are well known for frying the rectifer which in turn knackers the battery.

Oh yes indeedy.... I dunno why they are so bad, as other bikes use the same rectifiers...

The ones I have seen have overheated, but whether that was before or after the problems occurs, I have no idea. I improved air flow and stopped spray contamination on a problem bike and been good ever since.

My nephew had a 650 Honda that cooked the wiring and required a small rewire job as well!

 

[Mc115reed]

Oh yes indeedy.... I dunno why they are so bad, as other bikes use the same rectifiers...

The ones I have seen have overheated, but whether that was before or after the problems occurs, I have no idea. I improved air flow and stopped spray contamination on a problem bike and been good ever since.

My nephew had a 650 Honda that cooked the wiring and required a small rewire job as well!

My rectifier stopped charging the battery and I would jump start it after a week of jump starting it the rectifier caught fire and melted the wiring loom around it [emoji23]