Need Help Identifying a Relay
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Fleet Mechanic
Joined: Feb 2004
Posts: 1,509
Likes: 333
From: Arlington,Wa
Need Help Identifying a Relay
I have a 76 F-350 SCS....it was my Dad's truck, but he's famous for hacking stuff up. Case in point, the blower motor stopped working so he wired in a switch to turn it off and on. I found the plug he sliced into and it appears that some kind of relay is suppose to be in the socket. Anyone know the name of aforementioned relay?? Has 3 prongs. All I got is a Haynes manual for a schematic and near as i can tell its an accessory safety relay....
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
If it's a Ford safety relay, it will have a ID number marked on it. Here are a couple of examples that apply to Super Camper Specials:
D2LY-14512-A .. Safety Relay-Use with Camper Package / Marked: D2LB-14C690-AA / D5AB-14C690-AA, BA, CA
D2SZ-14677-B .. Safety Relay-Use with Camper Package / Marked: D2SB-AA / D3AB-AA
If the ID number marked on the relay isn't one of the above, post what the number is.
D2LY-14512-A .. Safety Relay-Use with Camper Package / Marked: D2LB-14C690-AA / D5AB-14C690-AA, BA, CA
D2SZ-14677-B .. Safety Relay-Use with Camper Package / Marked: D2SB-AA / D3AB-AA
If the ID number marked on the relay isn't one of the above, post what the number is.
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Fleet Mechanic
Joined: Feb 2004
Posts: 1,509
Likes: 333
From: Arlington,Wa
I'll have to go out and get the colors of the wires there HIO....
Thanks for those numbers ND....but I don't have the original.
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Fleet Mechanic
Joined: Feb 2004
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From: Arlington,Wa
Please Re-post
Please re-post your thread with a title so you can get some answers. People wont see it since you posted under my title which has nothing to do with your problem. I don't think you have a relay issue. It sounds like its getting power to the starter. Growling noise.....check battery voltage.
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Fleet Mechanic
Joined: Feb 2004
Posts: 1,509
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From: Arlington,Wa
I got the wire colors: Orange, Red W/black stripe and Yellow W/red stripe. Also confirmed its not the plug that goes to the resistor. That one is OK.
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Red/Black is LOW
Where is the plug located? Behind the radio/ heater controls or under the hood?
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you should start a new thread with a descriptive title outside of this thread. You will get more help that way.
Elder User
Joined: Aug 2011
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From: Cape Coral, Florida
I have factory a/c in my 77 f250 and when my blower quit it turned out to be a 3prong relay screwed into the underside of the dash at the glove box, Napa had it in stock. not sure if thats any help.
New User
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1979 400M starter problem
My starter turns the motor two to three times making a growling noise then I try to start the engine again and it makes a zing noise and doesn't turn the motor. new ring gear on flywheel and have tried five starters and they all do the same thing.can someone help me?
Rusty Roller
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From: Santa Cruz Mountains
Start a NEW thread by "Clicking Here" See Picture below:
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Fleet Mechanic
Joined: Feb 2004
Posts: 1,509
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From: Arlington,Wa
Yes....it helps a little. The plug is behind the glove box. Or at least ...it should be. I think NAPA will be on my list of errands today. Thanks for all your help.
MSEE
Joined: Apr 2004
Posts: 10,386
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From: Austin, TX
These trucks do not have a relay in the blower motor circuit. They go through the speed switch full on; that's why the switches wear out so fast. The speed switch adds in different taps of the blower motor resistor for all speeds below HI, for HI the switch is bypassed and the only thing in between the blower motor and fused power is the selector switch.
If someone actually did find a relay in their setup, please post a picture. It would be news to me (been wrong before plenty of times).
If someone actually did find a relay in their setup, please post a picture. It would be news to me (been wrong before plenty of times).
Elder User
Joined: Aug 2011
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From: Cape Coral, Florida
These trucks do not have a relay in the blower motor circuit. They go through the speed switch full on; that's why the switches wear out so fast. The speed switch adds in different taps of the blower motor resistor for all speeds below HI, for HI the switch is bypassed and the only thing in between the blower motor and fused power is the selector switch.
If someone actually did find a relay in their setup, please post a picture. It would be news to me (been wrong before plenty of times).
If someone actually did find a relay in their setup, please post a picture. It would be news to me (been wrong before plenty of times).
Well i had to check my title! yup 1977 f250 factory air, LOL
I do have a three prong relay in the blower circuit located under dash, it must be a factory relay seeing NAPA had a part number for it, it was ordered and when i hooked it up blower worked again. It's called an A/C Relay part # ECH AR235. blower does not work without it.