Super Glide, Wide Glide, Road Glide, Electra Glide?
If the mid controls in your avatar mean anything, it is a Super Glide.
Super Glides didn't get a fuel pump until 04, when they went injected. For 02, it was a starter relay. For 04 injected, it was a system relay. Different parts, but both had diodes.
The diode is required to avoid large back emf while the dc supply to relay coil is switched off. In absence of the diode, the switch controlling the relay supply will get damaged.
Be glad you don't have an injected Road Glide. They have four relays with diodes.
If the mid controls in your avatar mean anything, it is a Super Glide.
Super Glides didn't get a fuel pump until 04, when they went injected. For 02, it was a starter relay. For 04 injected, it was a system relay. Different parts, but both had diodes.
The diode is required to avoid large back emf while the dc supply to relay coil is switched off. In absence of the diode, the switch controlling the relay supply will get damaged.
Be glad you don't have an injected Road Glide. They have four relays with diodes.