How to replace 100 amp fuse next to battery under hood?

These bigger fuses are sometimes bolted in. If you are looking at the fuse box under the hood, look on either side of the box. You should see little bolts to remove that will let the 100 amp come out. Oh yeah, disconnect the battery first!!!...Chris

You need spark to the plugs, fuel to the injectors, and normal compression. One of the three is missing.

check the large fuses in the under hood fuse box if someone jumped it backwards it blows a lot of fuses out

[email protected] all the fuses and relays in the 2 boxes under the hood and another one of fuses and relays panel inside the car, front of the driver seat, behind the pull out box next to the hood release handle..Under the hood check inside the one with 8" black square box;Check # 1 slot fuse, it is 60 amps for (+B ), check # 8 slot fuse for Engine control 20 amps, check # 15 slot Fuel pump 15 amps..And check another skinny black box lie next to that box, it has relay F, that is Engine control, check that also...And inside the car fuses panel; Check # 1 slot fuse 10 amps that for Ignition coil, # 8 slot Engine control 7.5 amps, # 12 slot Engine control 7.5 amps..After that recheck the battery post, that maybe needed re-tight..Don't force to tight too much, that will crack and broke the post and the plastic battery body...And check all the ignition wires and spark plugs that are tight or needed to replace..And check all the vacuum lines that are loose and leaks suctions or sometimes they are crack open by long ages..By the way check and recheck all those other fuses and relay for make sure they are good...Believe me that not hard to figure out those problems..You did everything rights so far..That one 100 amps fuse at the + battery post cable was connect to alternator for recharging your battery and give power to other items when car was running..Below that post, the middle cable was connect to the starter motor and the bottom cable was connect to that 8" black fuses and relays box under the hood...

At a guess, I'd say that you have got the new battery in back to front. This means that you are hooking the earth wires to the Positive side of the battery.

You check in the HIGH FUSE BOX (under hood, near battery)?

Also I suggest check your Grand Marquis Owners Manual (page 274 and next).




Fig. 11: 1989-91 Charging chassis schematic





FIG : 12: 1992-97 Charging chassis schematic

Hope this help (remember comment and rated).

You check in the HIGH FUSE BOX (under hood, near battery)?

I suggest also Grand Marquis Owners Manual (page 274 and next).




Fig. Fig. 11: 1989-91 Charging chassis schematic





FIG : Fig. 12: 1992-97 Charging chassis schematic

Hope this help (remember comment and rated).

interior fuse should be the culprit. Look for the Radio fuse inside (normally 10A red) sometimes labeled CABIN on the fuse layout