On the one I got off of a Caddy Cimmeron, there was another little gadget
connected in the vac line that had a couple o wires on it. I thought that
this was the pressure switch. Later figured out that I needed to throw
that piece away. Still don't know what it was.
Just use the 3 wires that come from the pump itself.
Hope this helps
bdub
Deep in the Heart o Texas
>-- [ From: Eugene Fisher * EMC.Ver #3.1a PRODIGY ] --
>
>Hummmmmm
>yours sounds a little different. The ones I have seen only have the
>three wires.
>blk --- ground
>red----- +12 volts
>blk.wht- to the acc switch.
>
>The pump is installed between the booster and the engine. That way the
>pump only runs when the vac is is not there (like you said). If the
>engine is supplying enough vac then the pump does not come on. Sounds
>like your switch is separate from the pump ?? I am not sure what that
>is. Does your pump look like the ones in the picture ??
>
>gene
>
>-------- REPLY, Original message follows --------
>
>Date: Wednesday, 08-Sep-99 10:52 AM
>
>From: Edgar Edwards \ Internet: (ededw)
>To: Eugene Fisher \ PRODIGY: (JDDP32B)
>
>Attachment: mimemsg.doc Code: 08QEU1O \ Created: Unknown [4 Kb]
>Attachment: 00000001.unk Code: 08QEU1O \ Created: Unknown [2 Kb]
>
>Subject: Supplemental Vac. Pump
>
>Gene, I downloaded your inst for subj pump and yesterday went to my
>handy dandy u-pull salvage yard.. Got the pump with all the attachments.
>Pump works dandy. I believe have installation and wireing figured out
>except for vac switch. I am assuming this is open switch as long as
>sufficient engine vac exist?? when vac is lost-- switch closes sending
>ign current to vac pump motor conn B. which turns on motor. Furthur
>assume the two tan wires on vac switch are to be connected between ign
>and connection B on pump. If this is correct then my ? is what to do
>with black wire from vac switch?? I would appreicate it if you would
>advise if my assumptions are correct and where the black wire goes.
>Thanks Much Ed. Edwards Sarasota Fl.
>ededw
>
>-------- REPLY, End of original message --------
>
>
>
>Gene 76Palm Beach /Or/CA
>
>GMC Technical Information
>http://www.california.com/~eagle/
connected in the vac line that had a couple o wires on it. I thought that
this was the pressure switch. Later figured out that I needed to throw
that piece away. Still don't know what it was.
Just use the 3 wires that come from the pump itself.
Hope this helps
bdub
Deep in the Heart o Texas
>-- [ From: Eugene Fisher * EMC.Ver #3.1a PRODIGY ] --
>
>Hummmmmm
>yours sounds a little different. The ones I have seen only have the
>three wires.
>blk --- ground
>red----- +12 volts
>blk.wht- to the acc switch.
>
>The pump is installed between the booster and the engine. That way the
>pump only runs when the vac is is not there (like you said). If the
>engine is supplying enough vac then the pump does not come on. Sounds
>like your switch is separate from the pump ?? I am not sure what that
>is. Does your pump look like the ones in the picture ??
>
>gene
>
>-------- REPLY, Original message follows --------
>
>Date: Wednesday, 08-Sep-99 10:52 AM
>
>From: Edgar Edwards \ Internet: (ededw)
>To: Eugene Fisher \ PRODIGY: (JDDP32B)
>
>Attachment: mimemsg.doc Code: 08QEU1O \ Created: Unknown [4 Kb]
>Attachment: 00000001.unk Code: 08QEU1O \ Created: Unknown [2 Kb]
>
>Subject: Supplemental Vac. Pump
>
>Gene, I downloaded your inst for subj pump and yesterday went to my
>handy dandy u-pull salvage yard.. Got the pump with all the attachments.
>Pump works dandy. I believe have installation and wireing figured out
>except for vac switch. I am assuming this is open switch as long as
>sufficient engine vac exist?? when vac is lost-- switch closes sending
>ign current to vac pump motor conn B. which turns on motor. Furthur
>assume the two tan wires on vac switch are to be connected between ign
>and connection B on pump. If this is correct then my ? is what to do
>with black wire from vac switch?? I would appreicate it if you would
>advise if my assumptions are correct and where the black wire goes.
>Thanks Much Ed. Edwards Sarasota Fl.
>ededw
>
>-------- REPLY, End of original message --------
>
>
>
>Gene 76Palm Beach /Or/CA
>
>GMC Technical Information
>http://www.california.com/~eagle/
