Yes voltage drop is the same without fuel pump. Most of the time the voltage is 13.2 from the back of relay then it can drop below 12 for maybe a second then it goes back to 13+ then maybe 12.4 for a second then back up.I hate to buy a new relay at $125 or so, i think it is in the wiring. This morning i moved wiring and it seemed to affect it but before i could locate witch wire it stopped affecting it. I have along history with this yellow lemon i have replaced major connectors , gang green wiring,stator, R&R, fuel pump, relay it never seems to end I wish I didnt like thrill so much. Thanks for the reply.