i recently bought a 2008 f250. It came with the small mirror. I want to upgrade to towing mirror. My existing ones are power only. No heat or turn signals. I am have a hard time finding only power option in the towing mirrors. Will the ones with the heat and turn signals be compatible with my truck?

It’s a 2008 not a 98. I could t figure out how to edit title.

Compatable meaning all the features would work?

The cornering/turns should be present at the connector. If/when the drivers mirror head is removed, check for circuit function ops there with a 12v test light or meter on the Brown/green wire on the connector. Lamp functions come from the Smart Junction Box.

Mirror heat,, you can check for circuit protection/fuses in the Battery Junction Box (fuses 28 -20amp, 23-15amp) and that the Heated Mirror Relay is present. And again at the mirror head connector (defrost/heat selected on the panel ) on the brown/yellow wire.
The heated function is controlled by the SJB as well as the EATC/EMTC. If the fuses or relay are missing, it may not be hardware equipped for heating ops..

thank you. I was able to get door panel and mirror our and get picture of wires. Only for it to start raining. I will look at other stuff tomorrow.

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If the feature was there with the OE mirrors, it will be available on the TT mirror upgrade..