Engine/Transmission (1998.5 - 2002) Heater grid -which battery?

[ERIK ARNOLD]

Hello- Does anyone know which battery is used to energize the heater grid passenger or drivers side?
Thanks

 

[GAmes]

Each battery shares the load of all the appliances. That is how parallel system work.

 

[petersonj]

What @GAmes says is true; however, the heavy gauge intake heater wires are directly connected to the driver side battery, just in case this is what you wanted to know. There is a fusible link in each wire.

- John

 

[ERIK ARNOLD]

Thank you for the info

 

[Matt42]

Guy I knew with a 12 valve in Gabbs, NV used to rotate his batteries each year.

 

[Chief USA]

If you plug in the block heater a few hours before starting the engine, the grid heaters don't put near the load on the batteries and charging system. Just have to plan ahead to plug in the truck before use as much as you can. It not difficult.

 

[GAmes]

Guy I knew with a 12 valve in Gabbs, NV used to rotate his batteries each year.

That is funny.

 

[GAmes]

If you plug in the block heater a few hours before starting the engine, the grid heaters don't put near the load on the batteries and charging system. Just have to plan ahead to plug in the truck before use as much as you can. It not difficult.

Better yet, bypass the PCM and put the relays neg posts on a toggle or momentary switch. Once the engine is running it doesn't need the grids to cycle. Does away with the annoying dimming headlights.

 

[petersonj]

Better yet, bypass the PCM and put the relays neg posts on a toggle or momentary switch. Once the engine is running it doesn't need the grids to cycle. Does away with the annoying dimming headlights.

Did that very thing 23 years ago. Hardly ever use the grid heaters, but it's nice when I do.

- John

 

[Joe Mc]

Not sure what year this started = at 15mph (or was it 1500rpm) grid heater circuit disengages, at least that's what I remembered 99 doing. Obviously once engine up to temp they're not running.