fog light relay

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kjcdc090385

Member - Posts: 3

Joined: May 08, 2007

Location: United States

Posted: May 08, 2007 at 10:53 PM / IP Logged

I need assistance with adding stock fog lights to my 04 jeep grand cherokee. I am slowly accumulating the pieces of a mopar fog light kit..but no installation instruction. So i have a multifunction switch with the fog light option..but I do not know how to wire the relay that jeep recomends i use( I want to keep with all the parts that jeeps recomends)

here is a picture of the relay

fog light relay -- posted image.

so i have a wire from the switch, a wire from the battery...wires to go to each fog light and ground wires...but no idea how to hook them up to this relay..there is a small picture of the set up of the conection points on the side of the relay in the picture. there are three prongs on the bottom and two at the top. also..where does the fuse go in all of this?

flobee4

Silver - Posts: 585

Joined: January 02, 2004

Location: United States

Posted: May 09, 2007 at 12:01 AM / IP Logged

I didn't read through it, but thiis should help.

http://www.wjjeeps.com/lamps/lampsupgrade.htm#FOG

Frank

kjcdc090385

Member - Posts: 3

Joined: May 08, 2007

Location: United States

Posted: May 09, 2007 at 5:58 AM / IP Logged

YEa I have been there and it does not give detailed instructions for an 04 unfortunatly! fog light relay -- posted image.

iblis

Member - Posts: 19

Joined: April 06, 2006

Location: Ireland

Posted: May 09, 2007 at 9:31 AM / IP Logged

I presume the relay is an SPDT type. If so you should have the following poles on the bottom:

85 - one side of the coil

86 - the other side of the coil

30 - common

87a - normally closed

87 - normally open

You should connect as follows:

85 - 12V live from switch

86 - earth

30 - 12V live from battery (there should be an appropriate fuse between the battery and relay)

87a - nothing

87 - output to the fog lights

If the terminals are labelled differently post up a real close up of the diagram on the relay and the terminals.

iblis

Member - Posts: 19

Joined: April 06, 2006

Location: Ireland

Posted: May 09, 2007 at 9:45 AM / IP Logged

kjcdc090385

Member - Posts: 3

Joined: May 08, 2007

Location: United States

Posted: May 09, 2007 at 5:22 PM / IP Logged

They are labled 1,4,2 on the top three which are all side by side not staggered...and 3,5 at the bottom side by side..it is napa part number AR606

fog light relay -- posted image.

iblis

Member - Posts: 19

Joined: April 06, 2006

Location: Ireland

Posted: May 10, 2007 at 3:43 AM / IP Logged

Going from the picture at the top I think the following applies. I have relabelled the terminals as I can't see which number goes with which in the above photo.

A and C appear to be the two sides of the coil. You can check for a circuit using a multimeter (should be near infinite resistance between them). If they are there should be 12V live from the switch connected to one and earth to the other. Doesn't matter which.

E appears to be the common terminal and fused 12V from the battery should be connected here.

B and D then are the normally closed and normally open terminals. I can't tell from the diagram which is which. There should be a circuit between normally closed and the common terminal when no power is applied to the relay. When the coil is energised there will be a circuit between the common terminal and the normally open terminal.

iblis

Member - Posts: 19

Joined: April 06, 2006

Location: Ireland

Posted: May 10, 2007 at 3:45 AM / IP Logged

If you mix up B and D all that'll happen is the fog lights will be on when the switch is off and off when the switch is on. So trial and error might be the quickest way forward.

KPierson

Platinum - Posts: 3,527

This member consistently provides reliable information

Joined: April 14, 2005

Location: Ohio, United States

Posted: May 10, 2007 at 9:14 AM / IP Logged

iblis wrote:

A and C appear to be the two sides of the coil. You can check for a circuit using a multimeter (should be near infinite resistance between them).

The coil should have a resistance less then 500 ohms. I would expect it to be in the 40-120ohm range, but it will vary from each model (and even from part to part)

Kevin Pierson

iblis

Member - Posts: 19

Joined: April 06, 2006

Location: Ireland

Posted: May 10, 2007 at 10:07 AM / IP Logged

KPierson wrote:

iblis wrote:

A and C appear to be the two sides of the coil. You can check for a circuit using a multimeter (should be near infinite resistance between them).

The coil should have a resistance less then 500 ohms. I would expect it to be in the 40-120ohm range, but it will vary from each model (and even from part to part)

Actually yes, I must have been reading the wrong scale on the multimeter.

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fog light relay

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