View Full Version : Wedge tr7 fi combination relay

01-07-2004, 07:14 PM
does anybody have the pin out diagram of the combination relay used for a tr7 fuel injection harness? am converting to v8, ecu harness unplugs neatly from one side, want to ensure fuel pump energizes properly. thanks, philman

01-10-2004, 12:41 AM
Read your post a couple days ago, but was and am unsure about what you're asking for. I have replaced this part on my 7 then repaired the old one as a spare after I found the faulty ( or is that Fawlty) soldered joint inside it. The pin locations though I am not that familiar with, it does seem to me though that something like that is embossed on the relay itself. Good Luck

01-10-2004, 01:56 AM
the relay body diagrams pin numbers to the pins on the base; I wanted to know which pins were the normally closed/open connections, common, coil, etc.

01-10-2004, 02:17 AM
let me get this straight you need the diagram for the tr7 pin or the tr8 pin set up i believe i can direct you to the tr8..set up and maybe the tr7 but i will need to check..

01-10-2004, 10:57 AM
I am dropping a fuel injected v8 into a tr7 and am trying to ensure the fuel pump wiring is correct while it's easy to modify - no no seats or carpeting in the way. i am not sure if there are two coils or only one to energize the fuel pump relay.

01-29-2004, 12:53 AM
OK I found what I wanted. 86/86a +12 to coil on fuel pump side of relay. 88y +12 to fuel pump side contacts; 88c/88d NO contacts to fuel pump side of relay. 86c +12 to coil of FI side of relay, 88z +12 to FI side contacts; 88a/88b NO contacts on FI side of combination relay. The Texas Porche912 organisation has a pretty good Jetronic FI manual available on line; with troubleshooting guide, pin outs of ECU. This information should be good for FI 7's and 8's


[ 01-29-2004: Message edited by: philman ]

[ 01-29-2004: Message edited by: philman ]

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01-30-2004, 10:15 AM
Thanks for the update! Very interesting. Appreciate what you're doing with the FI engine swap. Got pictures?

01-30-2004, 03:00 PM
I will have plenty of fotos when I am finished. my machine shop guy got ill and had to take a few weeks off. so i am behind schedule for march roll out, probably april now.