Precharge delay circuit (boring)

This is a little circuit which uses a 555 timer and a resistor/capacitor arrangement to delay the onset of a relay. I plan on using this to delay the activation of the main contactor while the precharge circuit is enabled. So far so good. The larger DPDT relay is going to be used to switch the precharge circuit on via the ACC position on the starter key. It is good for 30 V DC but I'm asking it to do 115 V DC. Bigger spark, low current. We'll see how long it lasts.