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12v PDB relay
Posted: Sun Feb 13, 2011 10:35 pm
by Billymac
Hi, hopefully you guys have come across this before: The 12v power relay that switches in a lot of the PDB ccts e.g. Engine Crank relay etc is not powering up, when i hold it in everything works fine, the 12v is at the contacts, the 24v supply is at the relay coils but it seems as though the relay enable signal is not being generated from the battery equalisation cct to provide the earth to the coil. I've changed the PDB which would suggesty that its not that but i'm following my tail at the moment.
Cheers
Re: 12v PDB relay
Posted: Mon Feb 14, 2011 2:24 am
by spandit
If you put 24V across the coil, does it close the relay? If so, it would suggest the relay is fine. If not, coil might have a break in it.
Don't know where this PDB is - is this a diesel Pinz thing? Confused as to why you'd only use 12V to crank
Re: 12v PDB relay
Posted: Mon Feb 14, 2011 3:25 pm
by Billymac
The 12v is the power rail for the circuitry in the Power Distribution Box (PDB), the problem is that the equalisation circuit isn't providing the return path for the relay to energise, I'm just wondering what may inhibit it??
Re: 12v PDB relay
Posted: Fri Feb 25, 2011 2:39 pm
by audiocontr
Spam