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Old July 20th, 2011, 12:33 PM   #1
Ford rules
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Default Should relays get warm? what causes this?

So i have a 95 ford ranger with a fuel injected 5.0 and 4R70W tranny 203/205 transfer case. My question is that there are three relays under the hood that will get some what hot when the truck is either running or just with the key on and engine off they are the WOT ac cut off relay fuel pump relay and pcm power relay. Is this normal?
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Old July 20th, 2011, 09:53 PM   #2
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Of course. If the coil of the relay is energized it's going to get warm.
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Old July 20th, 2011, 10:06 PM   #3
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Correct. A relay is just an electric switch.
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Old July 20th, 2011, 10:34 PM   #4
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So i shouldnt worry that it gets warm then?
I was thinking the same thing but my brother made a big deal of it and i didnt want it to lead to problems down the road (truck burns to ground).
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Old July 21st, 2011, 01:12 AM   #5
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If your using the proper gauge wire,and they have a good ground,dont be afraid of a lil heat,they are "working" they might get hot.
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Old July 21st, 2011, 08:04 AM   #6
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Well there the factory wiring and relays so they should be wired properly anyways lol
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