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Stone said:Dave S (and other experts):
When I was installing Bruce's (A2b in a tlc) off road lighting yesterday, I noticed that his truck didn't have the external voltage regulator on the right fender like mine does. He has a 1988 BJ74 just like mine, but his has all the power options. We were wondering if there was a change in alternators midway through the model year, or if he has a bigger alternator maybe with a built in regulator to compensate for all the electrical accessories that were installed from the factory?
Unfortunately the install went a lot longer than planned and we didn't have time to closely compare our two alternators. Hoping for the lazy man's answer out. Thanks.
Greg_B said:Strange on the alternator Stone. I don't have my BJ74 here to check. I have only seen the external so far, and all our spares are external iirc.
gb
mine is blue block external reg. well 30 amps isnt too badGreg_B said:I was wrong. I got to drive the BJ74 tonight, and remembered to pop the hood. My BJ74 is an internal regulator. I wonder if the change from external to internal for the JDM 13BT BJ74 is Red Block vs Blue Block. (Red being external and blue being internal).
Michael, I would guess yours is blue block then, and internal...
Either are still 30amps at 24V's though.
gb
so this is why it works so well, then, eh?Stone said:Tom: Also, think about voltage as the force that pushes the electrons, and the amperage as the number of electrons being pushed. Hooking up a 12v winch in a 24v system would also mean a lot more current running through it...which is why a 12v winch works so fast in a 24v system.
Ohms Law.
Just for argument's sake, let's say a 12v winch draws 100A when operating. This would mean that the resistance in that winch is 0.12 ohms. Now you take that 12v winch and double the voltage to it by hooking it up to 24v. The internal resistance of the winch remains the same at 0.12 ohms, but putting 24v into it now means that it's making 200 A.
frp88 said:mine is blue block external reg. well 30 amps isnt too bad
some off the winch challange guys do that for double line speed
but the trend is more for hydraulic and pto
crushers said:so this is why it works so well, then, eh?
;^)
tlcruiserman said:I am 90% sure my 89' Bj74 has the regulator built into the alternator. I will check and report back tonight. I am also sure it puts out more than 25amps.Michael