Relays getting warm? Is this normal? - Ranger-Forums - The Ultimate Ford Ranger Resource

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Old 07-20-2011
ford rules's Avatar
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Join Date: Aug 2008
Location: pinckney,MI
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Relays getting warm? Is this normal?

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 07-21-2011
sheltonfilms's Avatar
Join Date: Apr 2010
Location: Knoxville, TN
Posts: 631
Relays contain an inductor and because of the physics of inductance there will be heat.

Those three relays should always be on when the ignition is on, except for the WOT relay which is only on when the compressor needs to be on.

How hot are we talking?
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