| Author | Message | ||
     Dean |
battery/ alternator tester says voltage regulator PASS diodes FAIL where are these diodes & how can i test/ replace em? blowing headlights BTW dean in tennessee 615 545 1111 texts ok dean@learntoride.org | ||
| Teeps |
The diodes are in the voltage regulator. | ||
| Dean |
Thanks Teeps. what causes failure of the diodes? shes only got 19k miles... dean | ||
| Tempest766 |
re: dean -- design/application flaw? Wondering if VR failure will end up a "common defect" similar to wheel bearings on the Uly. My VR went out at 22,000 miles. Low to mid-20k range seems to be when I'm reading of VR failures becoming more common. | ||
| Mark_weiss |
The diodes make up the rectifier side of the rectifier/regulator unit. The purpose of the diode pairs is to convert AC power generated by the alternator into DC power that the bike can use. There are two diodes for each "phase" of the alternator. In the case of '08 and later, we have single phase alternators so should have two diodes encased in the R/R unit. Overheating and poor connections are the most common problems. Still have to replace the regulator/rectifier as a unit. | ||
| Dean |
Happy Thanksgiving! i've found loose ground at the steering head before & recently both battery cables ( after new battery install ). guess i better start checking fasteners more often... Dean | ||
| Dean |
Just replaced the voltage regulator & noticed my battery cables had loosened considerably in only 200 - 300 miles ... It's a new battery ... Suggestions on keeping em snug? Dean | ||
| Griffmeister |
How many terminals do you have attached to the battery? For example, have you added leads for a charger, maybe heated gear or other accessories? If so, try splicing all the leads into one pigtail so there is just one extra terminal to attach. If not, you could try putting a star washer between each surface to try and reduce the tendency to twist. Or pop the seat every 200 miles and torque the bolts. | ||
| Dean |
griff i have a battery tender attached too... i place the connectors under the cables - that may be the problem? | ||
| Griffmeister |
The more terminals there are under that bolt the faster they'll loosen up. Sounds like you only have the main cable and a tender lead, that's not bad. A star washer between each lead might help, couldn't hurt. That reminds me, I need to check mine too. | ||
| Dean |
I rode it 2 miles to o'reilly's this afternoon & tested the brand new voltage regulator & got the same FAIL on the diodes??? Hmmmm Dean | ||
| Reepicheep |
Effectively, there are no diodes. There is a voltage regulator, that is a black box. I think you have been lead down a rabbit hole (I've run down plenty myself). Put a digital volt meter on the battery with the bike not running. Tell us what the voltage is. Then start the bike and measure again. Tell us what the voltage is. That will probably clear it up. |
