Overdrive not working 89 ram50

Ok so I have an 89 ram50 with the 2.6l and a weber 32/36.
The overdrive quit working out of no where. The Overdrive button on the shift handle does nothing, the light on the column doesnt light up anymore when you disable overdrive with the button. Its like OD doesnt exist. Ive checked the connections at coolant temp sensor and everything seems good. Are there multiple temp senors? I've read that it could be the OD relay. I dont hear a relay click when hitting the OD button anymore. I just dont know where that relay is located. Cant find anything on google about the relay location either.
Anyone have any ideas?