Logo
FULL SITE MENU

Alternator question diode/resistor

C

Cantremember

New member
Hi everyone. I have a 1988 Sunrunner with a v-8 AQ 211 A Chevy 5.0 liter. I found out recently that the alternator was not charging. Checked things out and found the resistor/diode was not allowing the alternator to be turned on. Had 500,000 or so ohms in both directions . My question is can I just get rid of the diode and install a toggle switch on the dash or will I burn out the alternator? The boat is not worth much so I don't mind not going o.e.m on anything at this point. I realize this is needed to avoid back feeding the coil. Already had distributor upgrade many years ago. Thanks for any help. Just to clarify this is the exterior diode feeding the alternator not internal to it.
 
My question is can I just get rid of the diode and install a toggle switch on the dash or will I burn out the alternator?
Click to expand...
Two things
I'm not seeing a diode being used on the AQ 211 (see post 3 in link)

Next if it does use a diode like in the GL models, the diode has nothing to do with making the ALT work, it's there to supply power to the fuel pump once the motor starts
 

Attachments

  • VP wiring GL_A.jpg
    VP wiring GL_A.jpg
    102.6 KB · Views: 27
It's part number I believe is 834784. When I was checking out the no charging issue I had zero voltage output from the alternator- just normal battery voltage. After I found the high resistance on this combination resistor /diode I bypassed it and I then had 13.8 or so volts output. It was not allowing any voltage through it whatsoever. Of course when I did that the engine would not shut off and I had to choke it out to stop it. I haven't seen a wiring diagram as of yet but I'll check yours out but it doesn't seem to be correct for my boat. It doesn't have an electric fuel pump, it's mechanical.
 
Back
Top