Solved... Only happened in the mornings with heavy dew. Cleaned and tighened battery terminals.
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You can test a relay with and without a 9 volt battery. If you apply 9 volts to it and it's sufficient to turn on the relay, the NO switch will close and then have continuity with common. If you don't apply voltage, the NO switch will be open and not have continuity with common. You can use these continuity and resistance checks to test a relay to see if it works.
under the radio, in the relay and and fuse box, gray relay
Most fuel pumps operate on 12-14.2 Volts. (system voltage). Keep in mind that most fuel pumps operate off a relay and the relay is turned on and off by the engine computer. Most computer control the GROUND circuit of the relay to power it on and off. It is fairly common to have to replace the fuel pump in the tank as the brushes wear out after about 100,000 miles
There are multiple relay races: 4x100, 4x100, distance medley, and other less used relays. Every relay has 4 members.
When the radiator fan relay fails on a vehicle, it can quickly overheat due to the lack of cooling. The fan is designed to kick on at specific temperatures controlled by the relay.