</font><blockquote><font size="1" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">quote:</font><hr /><font size="2" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">Originally posted by jx94148:
<strong>
Carterman, What relays are you useing? Normal headlight relays? </strong></font><hr /></blockquote><font size="2" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">The circuit I built uses N.O. (Normally Open) DPST (Double Pole, Single Throw) relays.

Double Pole simply means that each relay has two separate switches in it that open and close in unison (contrast with Single Pole which only has one switch).

Single Throw means that the switches have an On and an Off position. (Contrasted with Double Throw switches which have two different On positions). Note, you can always use a double pole switch as a single pole switch, simply don't use one set of contacts.

Normally Open means the the switches are normally in the Off position unless the relay is activated.

I used two of these minuature relays from RadioShack.com. They are small and are meant to be soldered to a circuit board, which is what I was looking for, however, just about any Double Pole (DPDT or DPST) relay with a 12v coil that will handle around 5amps will work.

The Bosh-style headlight relays are typically SPDT. They won't work with the way that I wired my locker.

However, you can use them. I was originally going to use headlight relays. This is how I was going to wire them up.. This diagram is very similar to the first, but the current for the motor goes through the control switch as well as the relays, and the control switch needs to be a DPDT switch as it is used to reverse the polarity. This won't be a problem as long as you use a decent switch. I doubt the locker motor even draws all that much current. I haven't tested this diagram, but it should be valid.

<small>[ 10 April 2002, 04:20 PM: Message edited by: thecarterman ]</small>