Quote:
Originally Posted by Dave2
still had no interior lights, dash LED, no security indicator, or door chime. Headlight are nice and bright. Where should I start on diagnosing this?
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Ground Connections as
tomtom72 suggests.
There are two engine block ground connections (multiple grounds each) located just above the Bell Housing (rear of engine block) one on each side of the engine. There are several ground connections on the chassis near the battery frame rail and other ground connections near chassis components. There is also an engine to chassis ground strap from drivers side of engine block (on side rear of engine block) to drivers side frame rail.
The main Battery negative cable attaches to the side of the engine block just in front of the Bell Housing (primarily for the starter ground).
Check for ground continuity of any suspect component using an ohm meter. With one probe on the negative battery terminal and the other probe on the negative terminal of the suspect component you should get zero ohms with ignition key off as most components are not grounded through any switch.
Loosening those two engine block connections will not be easy as I mistakenly left the HVAC fan ground disconnected when installing the engine last time from the passenger side engine ground connection. I tried to get at the passenger side block ground connection from underneath (It could be very difficult) and I have Headers which makes the underneath approach considerably different.
Cleaning Engine Block Ground Connections
I decided to connect that HVAC fan ground to the rear most Plenum bolt instead which works perfectly as it helps keep that passenger side wire harness in place.
Disconnect ground wires, clean surfaces, clean grounding bolts or screws, use star washers if applicable.
As an aside.....and I am prolly the only one on this Forum......
I do NOT use trickle chargers but rather disconnect negative battery connection if ZR-1, Toyota Truck, JD Tractor sits for a period of time without starting. When I reconnect the negative battery connection (even when sitting disconnected over winter) the ZR-1, Toyota Truck, JD Tractor fires right up. I do not have power leaking through all the ground connections or trickle chargers powered up with wires strung all over. Disconnecting a trickle charger takes longer than just reconnecting the negative battery connection.
In one of the photos below there is a Green Ground Wire to Chassis.
that Green Wire is the New Starter Relay Ground Wire Starter Relay, Wiring Harness, Battery, and Plugs Tricks
Ground Strap Connection to Engine.............................Ground Connection from Bat and Engine to Chassis
.................................................. ...................................(green wire is NEW starter Relay ground)
Ground Connections Bolt to Engine Pass Side....................Ground Connections Bolt to Engine Drivers Side
Torx #30 to remove Drivers side Batt Panel....................5/16 inch Flex Ratchet to remove Negative Batt Terminal
SS Allen Head Bat Hold Down bolt shown..........................I remove if ZR-1 left sitting for more than two days
Electrical Ground Connections and Clutch Start Switch Linkage