are 4 pin vs 5 pin relays the same

OTreborO · August 17th, 2006, 11:18 AM

Ford uses a 4 pin relay for my 89-90 fuel pump and ecc. Autozone provides a generic relay with 5 prongs.

Has anyone replaced a 4 prong with a 5 prong. I realize the 5th prong in the harness is not connected, but am concerned if the relay will actually work or if I need a Ford part.

stang fanatic · August 17th, 2006, 04:28 PM

should be no problem....as long as pin apportioning is the same

Darrell · August 17th, 2006, 04:37 PM

The 5th pin is most likely an extra power out and probably labeled 87a. It will work fine.

F3R · August 21st, 2006, 01:24 AM

A 4 pin is a normally open relay an a 5 pin relay is normally open an a normally closed.

August 17th, 2006, 11:18 AM	#1
OTreborO Enthusiast Join Date: Apr 2006 Posts: 639	are 4 pin vs 5 pin relays the same Ford uses a 4 pin relay for my 89-90 fuel pump and ecc. Autozone provides a generic relay with 5 prongs. Has anyone replaced a 4 prong with a 5 prong. I realize the 5th prong in the harness is not connected, but am concerned if the relay will actually work or if I need a Ford part. __________________ "Those who forget the past are condemned to repeat it" Rev. Jim Jones

August 17th, 2006, 04:28 PM	#2
stang fanatic Enthusiast Join Date: May 2006 Location: El Paso, Tx Posts: 855	should be no problem....as long as pin apportioning is the same __________________ "The gods too are fond of a joke." "If I had only known, I would have been a locksmith. "

August 17th, 2006, 04:37 PM	#3
Darrell Feb 08 ROTM 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: Fond du Lac, Wisconsin Posts: 7,026	The 5th pin is most likely an extra power out and probably labeled 87a. It will work fine. __________________ Racing in memory of Dave Bandt 11/19/69 - 3/23/08 "he's traded his wheels for wings" Professor of Natural Aspiration Thanks to: Artie at Trick Flow, Dave at Team Z Motorsports, Brian at Total Engine Airflow and Harold at Furo Racecraft

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August 21st, 2006, 01:24 AM	#4
F3R Newbie Join Date: Jul 2006 Posts: 3	A 4 pin is a normally open relay an a 5 pin relay is normally open an a normally closed.

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