Join Date: Sep 2010
Location: Jacksonville fl
Checking the voltage at the battery, This is verbatum what my VN750 service manual says. 1). "If the output voltage does not rise as the engine speen increases then the R/R is defective or the alternator output is insufficient for the loads".
In the manual there is a resistance check that you can do for the R/R, let me see if i cant explain it to you. First of all we need to lable the contacts on the R/R with the connector removed. Make a small drawing for a referance. Top row from left to right contacts are; A1, A2, A3. Bottom row from left to right contacts are; G, M, B. For doing your readings meter polarity matters, so (-) means negitive meter lead and (+) means positive meter lead. Again these are resistance readings so all reading are in OHMS. By the manual if the readings are higher then specified or lower them specified, replace the R/R.
(- B) to (+ M, G, A1, A2, A3) = no continuity, infinity.
(- M) to (+ B, G, A1, A2, A3) = 10k to infinity.
(- G) to (+ B) = 0.4 to 2k, (+ M) = 1 to 5k, (+ A1, A2, A3) = 0.2 to 0.6k
(- A1,2,3) to (+ B) = 0.2 to 0.6k, (+ M, G) = infinity.
Last edited by ifixf18s; 05-18-2011 at 03:47 PM.