electric window relays

[tvr keith]

Some while ago there was a thread on this forum about fitting relays to speed up the windows. It was said that you need to use relays with 5 terminals and I don't understand why.
Surely a 4 terminal one will do connecting relevent terminals to;
earth
power
switch wiring
window motor
Anyone know why I would need the ones with 5 terminals?

[david beer]

You will need two 5 pin types as its a "changeover" that is needed, if you cant find the link with the pin connections, i can do it again.

[tvr4ever]

david beer said:

You will need two 5 pin types as its a "changeover" that is needed, if you cant find the link with the pin connections, i can do it again.

Yes Master, please do it again.

Grasshopper

[david beer]

www.pistonheads.com/gassing/topic.asp?h=0&t=222817&hw=+%2Bslow+%2Bwindows

Follow to the part where the pins are explaned, i will try and copy it, make it easier. Busy thread ! Hi Fred !!!
Edit to add this:

Find the 4 pin connector before it goes into the door, notice two thin wires and two thick wires, cut these thick ones or pull the plug apart and link out the thin wires.
look at the wiring layout of a "normal" automotive relay
87a join to 85 and to neg
86 to one "thin "wire from the switch
30 to motor "thick"
87 to pos

repeat with other relay
All the original wiring has to do is pull in the relays.!
Now when relay 1 gets a pos voltage it pulls in and joins 30 to 87 pos, relay 2 is not in use and 30 is to neg.
When relay 2 gets a pos it joins pin 30 to pos, relay 1 is not in use and pin 30 is to neg.
If they go the wrong way, simply reverse the "input" wire from the switch.

Edited by david beer on Tuesday 15th May 18:59