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Tech501
Tech501, Auto Service Technician
Category: Car
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Experience:  38 years exp, ASE Mastertech with L1 Advanced Engine performance
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1990 dodge: w/ 318 has bad voltage regulator (computer controlled)

Customer Question

1990 dodge w/ 318 has bad voltage regulator (computer controlled). Can I install a standard voltage regulator and if so, how I wire it up? Also. what type of voltage regulator should I use?
Submitted: 11 years ago.
Category: Car
Expert:  Tech501 replied 11 years ago.
 It can be done. I don't remember the wiring offhand. I had it written down. I'll have to search through some old papers at work tomorrow. I think we used a ford regulator.
Customer: replied 11 years ago.
Reply to Tech501's Post: No Comment Added
Expert:  Steve replied 11 years ago.

    The problem with taking this approach to the problem is that (1) The "check engine" light will probably be on afterwards, because the module will be attempting to control a charging circuit that is no longer connected.  If the light is on constantly, you will not know if any other problem develops in the vehicle.


   Also (2) If the module has an internal failure causing it to not be able to control alternator field, perhaps it has a cracked circuit board, corrosion, or other damage that will eventually cause it to have other failures also.


    I checked Carquest's pricing; a remanufactured SBEC controller for this vehicle ranges between 165.00 and 180.00 garage cost from them, and you can likely find one even cheaper if you search the discount stores.   You will need the number on your original one for accurate identification though; there are several versions used depending on options.    In my opinion, this would be a much better approach to ensure long term reliability than rigging in a different regulating circuit and ignoring the underlying base problem...

Expert:  Tech501 replied 11 years ago.
 I have seen it done and it didn't put a check engine light on. It just has to be rewired corrrectly. Sorry I didn't hang on to the wiring changes.
Customer: replied 11 years ago.
Thanks for your reply. Is there any way you could give me some more specific info? I'm willing to pay a reasonable fee. Thanks again.
                       Charlie
                      
Customer: replied 11 years ago.
No Comment Added
Expert:  Tech501 replied 11 years ago.
 It was another tech I saw do it and I didn't get the wiring from him. It's basically just matching the wires with the terminals on the regulator, field control, feed, etc, but I think you either have to add a power supply or a ground, I forget which. Sorry I couldn't be more help.

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