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07-21-2017, 01:09 PM
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#1 |
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Registered User
Join Date: Jan 2013
Location: Tucson, AZ
Posts: 60
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Battery draw! Electrical help needed.
This junction, (with the yellow sleeve) connects to two wires. One has a blown fuse. When connected to the positive battery terminal, it puts a significant parasitic drain on the battery. Questions: what circuit has the blown fuse. Where does the other wire (with the thick sleeve on it) go?
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07-21-2017, 02:12 PM
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#2 |
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Registered User
Join Date: Nov 2014
Location: Lincoln City DE
Posts: 1,292
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Re: Battery draw! Electrical help needed.
Is that an inline fuse or from the fusebox ? sound like a short
__________________
Stan 67 swb BLU MULE posted via flip-fone |
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07-21-2017, 02:40 PM
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#3 |
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Account Suspended
 Join Date: Jul 2016
Location: Tacoma, WA
Posts: 6,873
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Re: Battery draw! Electrical help needed.
The fuse is one side of the circuit for the amp meter, there is another similar fuse near the voltage regulator. If the large sleeve piece goes to the terminal block by the battery then I think it is main power into the fuse block.
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07-21-2017, 02:43 PM
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#4 |
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Account Suspended
Join Date: Jul 2016
Location: Tacoma, WA
Posts: 6,873
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Re: Battery draw! Electrical help needed.
I think the voltage regulator can malfunction and cause a draw on that fused circuit, check with ammeter hooked to that wire and disconnect the 4 wire plug on the voltage regulator.
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07-21-2017, 04:27 PM
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#5 |
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Registered User
Join Date: Jan 2013
Location: Tucson, AZ
Posts: 60
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Re: Battery draw! Electrical help needed.
Yes, the fuse is in-line.
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07-21-2017, 04:38 PM
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#6 |
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Registered User
Join Date: Jan 2013
Location: Tucson, AZ
Posts: 60
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Re: Battery draw! Electrical help needed.
That's it!
When I unplug the voltage regulator, the parasitic draw goes away. Thank you. Now I'll replace the fuse and have the regulator checked at O'Reilly's. Wish me luck... |
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07-21-2017, 05:21 PM
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#7 | |
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Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: Battery draw! Electrical help needed.
Quote:
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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07-21-2017, 06:25 PM
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#8 |
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Account Suspended
Join Date: Jul 2016
Location: Tacoma, WA
Posts: 6,873
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Re: Battery draw! Electrical help needed.
I should have added that the regulAtor is directly hooked to the alternator so unplugging the alternator wires could remove your draw too, not sure how to isolate regulAtor and alternator
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07-21-2017, 11:25 PM
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#9 |
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Registered User
Join Date: May 2016
Location: Fort Mohave, AZ
Posts: 354
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Re: Battery draw! Electrical help needed.
If the regulator checks out ok, then you might have a bad diode in your alternator. A simple check of each diodes front to back resistance will identify which diode. Using a DVM check the resistance then reverse the leads. You should get very low resistance and reversing the leads should give a much higher resistance. If the resistance is about the same then the diode is bad and could be leaking current.
__________________
1970 GMC 2500 700R Trans RideTech 4 link rear suspension - Air Bagged on all four corners 350 SBC 300hp Weiand Supercharger FiTech EFI |
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07-22-2017, 12:21 PM
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#10 |
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Msgt USAF Ret
  
Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,703
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Re: Battery draw! Electrical help needed.
Excellent advice in this thread by all.
The OP can also get a digital regulator if he wants to keep the stock alternator. If he wants to upgrade to the internally regulated alternator I recommend this thread. .http://67-72chevytrucks.com/vboard/s...d.php?t=417872 And a lot of information on the battery gauge wiring. http://67-72chevytrucks.com/vboard/s...d.php?t=393139
__________________
VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
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