Under passenger seat wiring Options

[vitamin914]

Hi Everyone,

I've had my 1974 914 since September 2021. Lots of good stuff going on with it, Fat Performance 2.4 litre engine with 1000 miles on it, decent body and rust repair etc.

Slowly working through correcting minor stuff that needs attention. Most of it is correction of PO not so correctly done work. Mounting a horn in the front wheel well (dry weather only car?), epoxied in burnt out halogen headlight bulbs, wood screws holding headlight retaining rings... the usual not done so right stuff.

I pulled out the seats for reupholstering (thank you search function for how to do this) and came across this mess with cut wires and loose connectors etc under the passenger seat. At least someone could have put masking tape on cut and unplugged wires if electrical tape was too much to ask for... this looks like a recipe for blown fuses. Hmmm... more wood screws?

Before pulling the seat I used to sometimes hear a faint buzz when the key was in the ignition. I think there is a buzzer in here. I can tell the seat sensors were not connected for the seatbelt warning sign that does nothing (not an issue).

Mechanical stuff isn't scary but electrical problems are (can't see those electrons moving). I'm not sure what to search for to see what I am facing. I am guessing some of this may have been related to the engine change? Not sure what the heavy gauge yellow and yellow/red wire do that are permanently connected now. The car has a dashboard switched electric fuel pump and dashboard switched powered fan oil cooler. There also seems to be an non standard relay doing something that a missing relay used to do.

From what I understand the brown wires are ground so no real problem unless it touches a non ground wire. Any suggestions what I am looking at and what to search for?