1990 grand Wagoneer 5 prong plug on driver side firewall

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Jdm1990gw
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1990 grand Wagoneer 5 prong plug on driver side firewall

Post by Jdm1990gw »

Does anyone know what the 5 prong plug on the driver side of the fire wall near the top and by the wiper motor is for? Mine is unplugged but I have no idea what it goes to. Also looking at pictures of older grand Wagoneer I don’t see that plug. It’s only on 89-91 I believe

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Re: 1990 grand Wagoneer 5 prong plug on driver side firewall

Post by sirrus »

Do you have a picture of it?

One thing that might be is connector for rear wiper (those came only on 89-91), but it should be 4 contacts.


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tgreese
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Re: 1990 grand Wagoneer 5 prong plug on driver side firewall

Post by tgreese »

The Tom Collins site has '89 wiring diagrams. I'd expect these to be the same as '90. It's quite a few pages - you could go through them and look for your connector. https://oljeep.com/gw/elec/GW_wiring.html
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Topic author
Jdm1990gw
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Re: 1990 grand Wagoneer 5 prong plug on driver side firewall

Post by Jdm1990gw »

Not sure how to post a photo on here. It’s for sure not the rear wiper. That’s working fine

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Re: 1990 grand Wagoneer 5 prong plug on driver side firewall

Post by GrandW »

5 prong.... could be one of the switches by the head light switch?

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Topic author
Jdm1990gw
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Re: 1990 grand Wagoneer 5 prong plug on driver side firewall

Post by Jdm1990gw »

http://www.grandwagoneer.net/image046.jpg

Try the above link. Should lead you to a picture of a red grand Wagoneer. If you look just past the master brake cylinder on the top of the firewall and to the right of the wiper motor there is the plug I’m talking about
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Re: 1990 grand Wagoneer 5 prong plug on driver side firewall

Post by HowardT64 »

Jdm1990gw wrote: Wed Mar 18, 2020 7:40 pm http://www.grandwagoneer.net/image046.jpg

Try the above link. Should lead you to a picture of a red grand Wagoneer. If you look just past the master brake cylinder on the top of the firewall and to the right of the wiper motor there is the plug I’m talking about
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Topic author
Jdm1990gw
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Re: 1990 grand Wagoneer 5 prong plug on driver side firewall

Post by Jdm1990gw »

It is! If only that’s what mine looked like. Instead I bought one with a birds nest of wires and I’m trying to figure out what each one is for

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Jdm1990gw
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Re: 1990 grand Wagoneer 5 prong plug on driver side firewall

Post by Jdm1990gw »

Well whatever it’s for I plugged it back in and it fried my msd box. Note to self if it’s unplugged leave it

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Re: 1990 grand Wagoneer 5 prong plug on driver side firewall

Post by fsj454 »

Heater relay :-bd
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Jdm1990gw
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Re: 1990 grand Wagoneer 5 prong plug on driver side firewall

Post by Jdm1990gw »

Yes it is. Thank you. I forgot to post that I found out what it was thanks to Ryan @ bjsoffroad
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