DIY: Oil Pressure Gauge

40 to 332

OK, so as I understand things, you installed a single "add-a-fuse" to the blower slot in the fuse panel. The add-a-fuse should have two slots ... one for the original factory fuse and the other for the fuse for the new circuit that powers the pressure gauge. It appears from your post that you installed a 10 amp fuse into each of the two slots. That may be your problem. The blower circuit requires a 15 amp fuse. I'd suggest referring to the instructions that came with the add-a-fuse and identify the slot that corresponds to the blower circuit and replace the 10 amp fuse with a 15 amp fuse. You can keep the 10 amp fuse in the slot that powers the new circuit (i.e., the pressure gauge) since the gauge itself will draw little power (i.e., less than 10 amps). Alternatively, read and follow the instructions below:

It appears that you're running both the red (+) wire that powers the gauge itself and the orange (illumination) wire that controls the lighting in the gauge from a single add-a-fuse. I'd suggest installing a second add-a-fuse. You can install it in the cigar lighter slot in the fuse panel. Use the original add-a-fuse to power the illumination circuit (i.e., connect the orange wire to it). Use the second add-a-fuse to power the gauge itself ( i.e., connect the red wire to it). Fuse selection should be as follows:

Original add-a-fuse : 15 amp fuse for the blower/5 amp fuse for illumination (orange wire) circuit. (According to the instructions in your earlier posts, it's rated at 2 amps).

Second add-a-fuse: 15 amp fuse for the cigar lighter/ 10 amp fuse for the gauge (red wire) circuit).

Trust the above helps!