[Ronbo]

Doesn't sound right, the two relays are for cutting over the L/R lamp circuits from the brake switch to the signal flasher pot. (relays being activated by the turn signal switch position)

If you also have emergency flashers an additional set of relays would be needed or a double pole double throw switch with an additional flasher pot.

This can be difficult to trace out unless your experienced with electrical systems. Might be best to seek out a shop that specializes in auto electrical systems.