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Building: Its been so long, I've Forgotten!!!
posted on 15/7/17 at 11:36 AM
Continuity Test
After being away from the kitcar scene for 6 years, I'm back!
I have pulled my locost out of the garage and cleaned off lots of cobwebs, dust and heaven knows what else! Including a mouse or two has eaten my seat
pads
No shocks, but the battery was dead (won't hold charge either)
But a jump from my daily car and started straight away!
Question:-
With the battery leads disconnected, ignition off, I get continuity..... Should I?
Loads of systems on board that might have a path from +ve to gnd via a capacitor or resistor etc which would give you continuity of sorts..
Better tests may be to measure the resistance across the cables or perhaps to measure the amperes drawn with the battery connected and nothing turned
on.... Id expect a few mAh draw.
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Would the last person who leaves the country please switch off the lights and close the door!
It is called parasitic drain and almost every car on the road has it. Most modern tintops have 50 to 70 ma parasitic drain after everything has
shut down and gone into sleep mode.
You can measurethe Key Of Engine Off drain current directly with a DMM on amps mode, if more than about 80ma I would investigate it. With current
drains if the draincurrent is high the alternator diodes are a prime suspect --- simply check the drain current with alternator disconnected.
To track it down if you have a good quality DMM you could try looking for tiny voltage drops each blade fuse.
See this YouTube from Matt at Schrodinger's Box channel
[Edited on 15/7/17 by britishtrident]
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
