The truck cluster is ready to have the module with only 3 modifications:
1) the sender loop, which extends past the rest of this flap, can be cut off to open the circuit into 2: an input for the module from the tank (bottom), and an output from the module to the gauge (top). This should only be done on SINGLE-tank applications since the delay will interfere with the gauge when switching tanks; on dual-tank applications, DO NOT CUT the loop, but insulate or remove the gauge output wiper (the inboard one of the pair to the R of the catch) so the gauge has no delay (no anti-slosh);
2) the 12V input to the module must be connected to another power circuit that is only active with the key forward in START or RUN, or back in ACC. On '92-96 non-tach (base) clusters, the trace is already powered.
3) since the film circuit lacks a trace for the ground output to the light, and there's no unused bulb position on the cluster, an external light will have to be installed wherever it looks good to you. The light isn't necessary for the module to work, but since truck gas tanks don't run side-to-side, they don't suffer from slosh that would affect the level gauge, so without the light, there's no reason for this mod. Modifying the face to say "Low Fuel" would be difficult, but placing the light behind the fuel pump icon on the gauge face or near the "E" will make its meaning obvious. With care, a hole can be drilled in the back of the gauge face to keep the light in-place, and to make it easier to see, and to isolate it from the gauge illumination. But a bright light will shine through the gauge face without drilling.
IF THE IMAGE IS TOO SMALL, click it.
Module terminals, top-to-bottom:
Light output (ground for ON)
12V input
Ground input
Fuel level output (delayed)
Fuel sender input
On F-series with dual tanks:
This module is designed to prevent sudden changes in the needle's position while the key is in RUN. So when switching tanks, it will take some time for the module to accept the new level & allow the gauge to display it, UNLESS the key is cycled OFF. So to make this mod more functional, simply apply insulating tape to the module's output terminal and leave the signal loop of the film circuit intact. This will eliminate the anti-slosh feature, but still allow the low fuel light to work.
See the PREVious & NEXT several captions...
![04sloshslot.jpg The truck cluster is ready to have the module with only 3 modifications:
1) the sender loop, which extends past the rest of this flap, can be cut off to open the circuit into 2: an input for the module from the tank (bottom), and an output from the module to the gauge (top). This should only be done on SINGLE-tank applications since the delay will interfere with the gauge when switching tanks; on dual-tank applications, DO NOT CUT the loop, but insulate or remove the gauge output wiper (the inboard one of the pair to the R of the catch) so the gauge has no delay (no anti-slosh);
[url=http://www.supermotors.net/vehicles/registry/media/846881][img]http://www.supermotors.net/getfile/846881/thumbnail/lowfuel88ke.jpg[/img][/url]
2) the 12V input to the module must be connected to another power circuit that is only active with the key forward in START or RUN, or back in ACC. On '92-96 non-tach (base) clusters, the trace is already powered.
3) since the film circuit lacks a trace for the ground output to the light, and there's no unused bulb position on the cluster, an external light will have to be installed wherever it looks good to you. The light isn't necessary for the module to work, but since truck gas tanks don't run side-to-side, they don't suffer from slosh that would affect the level gauge, so without the light, there's no reason for this mod. Modifying the face to say "Low Fuel" would be difficult, but placing the light behind the fuel pump icon on the gauge face or near the "E" will make its meaning obvious. With care, a hole can be drilled in the back of the gauge face to keep the light in-place, and to make it easier to see, and to isolate it from the gauge illumination. But a bright light will shine through the gauge face without drilling.
IF THE IMAGE IS TOO SMALL, click it.
Module terminals, top-to-bottom:
Light output (ground for ON)
12V input
Ground input
Fuel level output (delayed)
Fuel sender input
On F-series with dual tanks:
This module is designed to prevent sudden changes in the needle's position while the key is in RUN. So when switching tanks, it will take some time for the module to accept the new level & allow the gauge to display it, UNLESS the key is cycled OFF. So to make this mod more functional, simply apply insulating tape to the module's output terminal and leave the signal loop of the film circuit intact. This will eliminate the anti-slosh feature, but still allow the low fuel light to work.
See the PREVious & NEXT several captions...](https://www.supermotors.net/getfile/323165/fullsize/04sloshslot.jpg)