Mike, The inertia switch does not require any electrical power to operate. It is, however, wired to the door lock circuit. Shorting this lead to ground would cause fuse #10 to blow but should not effect operation of the fuel pump. "We're here to help you" DMC Joe / De Lorean Services / <dmcjoe@xxxx> Web Site: <www.deloreanservices.com> . ----- Original Message ----- From: Mike Substelny <msubstel@xxxx> To: <dmcnews@xxxxxxxxxxx> Sent: Monday, May 01, 2000 11:44 AM Subject: [DML] Inertia switch / fuse relationship? > Ever since I acquired my DeLorean it has not had an inertia switch. A > previous owner removed and bypassed it (all 81 and most 82 inertia > switches were recalled) and I never bothered to replace it. Until now. > > Last week I wanted to crank my engine without starting it, so I removed > the bypass. This worked nicely, and I congratulated myself on > cleverness. Unfortunately, the first time I put the bypass back I did > it incorrectly. I am concerned that I may have caused a short that blew > a fuse (or damaged another component). My fuel pump is no longer > getting power (it does work when jumpered). > > I have ordered a new inertia switch. Until it comes, I wanted to pose > this question to the list: is it possible for a clutzy inertia switch > bypass cause this type of short? > > The wiring diagram shows that one of the inertia switch leads goes to > ground, so a short may be possible. In my case all the fuses seem to > have survived, so now I am looking into the possibility that I damaged a > relay. > > Moral of the story: screwing around with one part in an electrical > system affects others. Take seriously any work on your electrical > system, even simple stuff. > > - Mike Substelny > VIN 01280, 7 years