<VV> Wiring the relay to the inertia shutoff switch

[Jack Kean]

Stephen,
 The purpose of the inertia switch is to interrupt a circuit if a 
certain amount of "g" force is encountered. It does not matter what part 
of the circuit you place it in. The only thing that matters is that it 
is installed where it can interrupt an electrical control (switched 12 
volts going to post 85 or the section from post 86 that goes to ground) 
or electrical power (12v to the pump (either before or after the relay 
(posts 30 or 87)) circuit. Take your pick.

In my installation, I placed the switch on the way to relay (the 12 volt 
input to the relay that could go on either 30 or 87).  Each installation 
is unique, but the basic functionality (as I described last week and 
Harry described below is the same).

Depending on the type of switch, you should be able to open the inertia 
switch simply by slapping in your hand (it hurts but you can do it). I 
have a switch for a late 80's Taurus which has a simple reset button on 
the top.

Hope this helps,

Jack Kean
Arlington, Texas

Harry Yarnell wrote:
> Is this the standard Bosch relay?
> Way I'd wire it would be one side of the inertia switch to +, other side to 
> 85.
> Ground 86.
> 87 to +.
> 30 to pump.
> Other side of pump to ground.
>
> Harry Yarnell
> Perryman garage and orphanage
> Perryman, MD
> hyarnell1 at earthlink.net
> ----- Original Message ----- 
> From: "Stephen Upham" <contactsmu at sbcglobal.net>
> To: "Virtual Vairs" <virtualvairs at corvair.org>
> Sent: Sunday, May 17, 2009 12:08 PM
> Subject: <VV> Wiring the relay to the inertia shutoff switch
>
>
>   
>> I got my relay hooked up and the pump is running.  When I tried to
>> attach the inertia switch, I could not get the right series of
>> connections in the right order to get it to operate.  I have checked
>> the switch with a circuit tester and it does function properly.  I
>> connected the harness wire and the positive of the inertia to (85) on
>> the relay and grounded the inertia to the body.  No pump.   I then
>> tried to combine the inertia ground and the relay ground (86) on the
>> relay, but again, no pump.
>>
>> What am I doing wrong?
>>
>> Stephen U
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