[T3] Why is it that when I got my 73SBIneverhadtoturnthekeysevera...

[William J]

My fuel pump on my late 73 SB has a brown wire that is always a ground and a 
red wire  #87 on the relay which also feeds the pump and electric AAR . 
Looking at it today I saw the plastic plug which is on the bottom end of the 
FP relay #86 & #85 #86 to the voltage supply relay and # 85 to the ECU . And 
#30/51 which goes to fuse 7 on the fuse box.

 I had a small mini momentary contact switch rated at 6 amp already wired to 
fuse 9 ( which is only for the key buzzer) . I have that switch mounted to 
the plastic cover under the steering col that's held in place by 3 screws , 
the switch is on the left side on that cover close to the dash so it clears 
everything right where the washer pump hose enters.

 Since the pump brown wire is just a fuel pump ground not leading to the 
relay or any relay and the switch already had power off fuse #9 which is hot 
all the time powering my radio so I can turn on the radio key off I have an 
8 amp fuse off fuse 9 which feeds the radio and also the primer switch. What 
I did was pull the single red pump lead off the pump relay #87 which also 
feeds power to the electric ARR somewhere down the line it has a connector 2 
wires to one . I placed a piggyback brass 2 male 1 female plugged on the RED 
pump wire and the off end of the switch on the male ends and then the female 
end to the pump relay #87 . I placed my dvom on amps across fuse #9 fuse out 
and read 2.3 amp. I also checked and it still works and times out the normal 
way 1 1/2 seconds with the ign switch . I don't see a way around powering 
the electric AAR since it's tied to #87 so part of the 2.3 amps is the AAR .

 On page 19 Bentley fuel system is what mine is wired like . There are no 
paired wires on the FP relay . What you describe sounds like one end of the 
switch takes it's power off #30/#51 one piggyback  and #87 the red pump lead 
or pump + another piggyback other end of the switch . I just used a 
different fuse for the power to the switch either way using the switch will 
still power the electic AAR since mine is an auto trans.
----- Original Message ----- 
From: "Jim Adney" <jadney at vwtype3.org>
To: <type3 at vwtype3.org>
Sent: Saturday, August 12, 2017 1:20 PM
Subject: Re: [T3] Why is it that when I got my 
73SBIneverhadtoturnthekeysevera...


> On 12 Aug 2017 at 10:05, William J wrote:
>
>>  I have the switch with the two wires soldered to it all I need to do
>> is find a place and wire it in. If I recall the pump ground and hot
>> come out under the relay and the pump hot goes to a plastic covered
>> connector on the realy so I can splice in between the relay and where
>> the pumps hot lead enters through the fire wall. It's a two wire
>> plastic covered cable. I have a few of those brass 1/4" adaptors one
>> female and two male I can use yet don't want to destroy the plastic two
>> lead plug on the relay.
>
> Don't do anything to the 2 wires in the plastic connector! Those are for 
> the
> relay coil and you don't need to touch those.
>
> Use the piggyback connectors to connect your 2 switch wires to 2 of the
> remaining pins on the relay. One wire to the single terminal and one wire 
> to
> either of the 2 that are paired. If your car is MT you'll only need one
> piggyback connector.
>
> -- 
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
>
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