Hot relays and tune resistor - normal?
Hot relays and tune resistor - normal?
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Discussion

taylormj4

Original Poster:

1,616 posts

290 months

Hi Folks,
Is it normal for the Ign and Fuel pump relays and the tune resistor to get hot?

Just back from a 45min drive (including being in slow traffic for quite a while and it has been a hot day today) and noticed that these relays were hot enough to be a little uncomfortable to hold in your hand. The tune resistor is warm but at a lower temperature than the relays.

Is that normal?

I presume the relays are held in whilst the engine is running / IGN is on so have current running through the coils permanently, which will generate heat. They are of course now plastic-cased rather than the old metal-cased ones, which won't help.

Wouldn't have expected much current to be running through a tune resistor though.

Belle427

11,411 posts

257 months

Relays will be warm especially in hotter weather, tune resistor is an odd one though as I don`t think any current runs through it.